-5/2x=30 what is x? how was it done?plz hlp?
826969
Multiply both sides by 2x so it looks like this -5/1=30*2x which is the same as -5=60x. The divide both sides by the 60 to isolate it. And ur answer comes out to be x= -5/60
437083
It depends how you break down the equation.\n\nIf you're saying that X = 5 then...\n\nIf something is in brackets then it's treated as a separate sum so for example 3 x (2+2) is the same as 3 x 4.\n\nIf there's no mathematical symbol then multiplication is used, in the above example the equation could have been written as 3(2+2).\n\nIn your equation the first part is 2 + 3 which equals 5.\n\nYour equation now becomes 5 (45x-2)\n\n45x is the same as 45 x 5 which is 225\n\nYour equation now becomes 5 (225-2)\n\n225 - 2 is 223\n\nYour equation now becomes 5 (223) which is the same as 5 x 223 so THE ANSWER TO YOUR EQUATION WOULD BE 1115\n\nBut the equation could also be read as 2 plus 3 lots of 45x minus 2 in which case the answer is 671 but if this were the case the equation should be written as 2(3(45x-2))\n\nIf you're saying that the answer to the equation is 5 then... \n\nAnother way to read the equation is 2 +3 multipliied by (45 times x minus 2) and the whole lot multiplied by x equals 5.  In which case x = 0.356295
50236
let the number be x\n\n1/(x-5) = 4 (1/2x)\n=> 1/(x-5) = 2/x\n=> x = 2x-10\n=> -x = -10\n=> x = 10\n\nthe number is 10.
576742
ANSWER: y = 2; x = -1/5\n\nSOLUTION:\n\n1) First solve for y.  You can do this by adding the two equations together:\n\n5x - 2y = -5\ny - 5x = 3\n\nNotice that you have a positive 5x on the first equation, and a minus 5x on the second equation, so they both cancel out and you can re-write the equation as follows:\n\n- 2y = -5\n   y = 3\n\nAdd up these 2 equations and you get: \n\n- 1y = -2   or y =  2\n\n2) Then solve for x by replacing y with 2.  You can use any of the 2 equations from the problem.\n\n5x - 2(2) = -5\n\n5x - 4 = -5\n\n5x = -5 + 4\n\n5x = -1\n\nx = -1/5
890732
2(x'-2x-3)=24-11x\n2x'-4x-6=24-11x\n2x+7'x-30=0\n(2x-5)(x+6)=0\n2x=5 or x=6\nx=5/2 or x=-6\n\nx'=x*x
771554
(x+5)(x-5)\n(x)^2-(5)^2\n=x^2-25
493796
You have to do the Trick, meaning you take out the 5 and reapply it to the number without the variable (2). This leaves you with: 5(xsquared-3x-10)=0\n\nFactor what is inside the parenthesis and get: (x+2)(x-5)\n\nThen reapply the 3 into the equations (but only into the variables, because your doing the trick) and you get:\n(5x+2)(5x-5)=0\n\nThen, set both equations to 0 and solve.\nThe first equation:5x+2=0\nSubtract the 2 from both sides to get: 5x=-2\n\nNext, divide the 5 out of both sides to get: x=-2/5\n\nThe second equation: 5x-5=0\nAdd 5 to both sides to get: 5x=5\n\nNext, divide the 5 out of both sides to get: x=5/5 or x=1\n\nFINAL ANSWERS:\nx=-2/5\nx=1\n\nIf it's a word problem and you can only have one answer, elimate the one that doesn't make sense. For example, if they are asking for the height of something, you wouldn't pick the negative number.
127942
hey the eq says 2x> x/2 + 45\nso get x/2+45's lcd\nso that's 2. x+90/2\nso 2x>x+90 all over 2\nthen cross multiply 2\nso it 'll become 4x> x + 90\ntranspose x\nthen 3x>90 didvide both sides by 3 so\nx> 30 that is the answer
752957
First I get all the constants on one side and the variable on the other (don't forget to change the sign):\n\n-2x = -27 + 5\n\nAdd these:\n\n-2x = -22\n\nChange the sign:\n\n2x = 22\n\nSolve:\n\nx = 11\n\nCheck:\n\n-2(11) - 5 = -22 - 5 = -27.  Good.
741209
-2x-3 > 4x+7 .... subtract 7 from both sides, you get...\n-2x-10 > 4x   ..... then add 2x to both sides, and you get...\n-10 > 6x       ...... multiply both sides by 1/6....\n-10/6 > x    ..... flip it around and reduce....\n-5/3 > x  OR  x < -5/3    \n\nx is less than or equal to -5/3\n\nYou can double check your answer.  Pick a number less than x, such as -2 (which is less that -5/3).  Plug it in.  You get...\n-2(-2) - 3 = 4-3 = 1\n4(-2) + 7 = -8+7 = -1\nand 1 is greater than -1, so it works!
701324
(y2 -y1)  / (x2 - x1)\n\n-5, -3        -5 , 2\nx1, y1       x2, y2 \n\ny's :  2-(-3) = 5       x's : -5 -(-5) = 0              (2 negatives = +)\n\nso  5/0  which means its undefined\n\nur teacher sux
746097
Simple algebra.\n\nLeft-Hand Side\n(x/2)*.57 = 0.285x\n\nRight-Hand Side\n(x+1)/2*50 = 25(x+1) = 25x + 25\n\nTogether\n0.285x = 25x + 25\n-25 = (25 - 0.285)x = 24.715x\nx = -25/24.715 = -1.0115
195023
(7/x) - (8/5x) = ?\n\n[(5*7) - 8]/ 5x = ?\n\nAnswer: 27/5 x
775656
2(x - 5)^2 = 3\nSo (x - 5)^2 = 3/2\nThus x - 5 = ± √(3/2)\n= ± √6 / 4\n\nThus x = 5 ± √6 / 4
735951
(x/4) +5 = (x/2) +1  is the equation if I understand you correctly.\n\nfirst, multiply both sides by 4 to get rid of the fraction on the left side, and it will also remove the fraction on the right side:\nx + 20 = 2x + 4\n\nnow you want to move all the variables to one side and the numbers to the other.  Do this by subtracting x from both sides and subtract 4 from both sides:\nx - x + 20 - 4 = 2x - x + 4 - 4\n(see how they will cancel and "move" to the other side)\n16 = x\n\nx = 16
32802
x2-4x=5\nx2-4x+4=5+4 (you get the xta 4 by dividing 4x by 2 and adding to both sides\n(x-2)2=9\n(take square root of both sides)\nx-2=3\nx=5
889666
5(x-1)=2(x+3)\n5x-5=2x+6\nadding -2x+5\n3x=11\nx=11/3 or 3 2/3\notherwise\n5(x-1)=2x+3\n5x-5=2x+3\n3x=8\nx=8/3\n=2 2/3