cant remember algebra...1y = 7y       ----        8?
815583
not sure what your question is, but here's a quick n' dirty to solving simple algebraic equations:\n\nwe'll use this simple equation 5 - x = 4x\n\n\nstep 1: get all your variables on one side of the = and constants on the other... think of the = as a balance point on a balance scale...  you can do anything to one side, and as long as you do it to the other, it will stay balanced!\n\nso to get the x from 5 - x to the other side, we need to add an x to both sides:  5 - x + x = 4x + x, 5 - 0 = 5x, 5 = 5x\n\nstep 2: get the variable down to one multiplier\n\nwe know what 5x is, but we want to know x... so how do we find out?  Well, since we know what 5 times x is, we can divide this by 5 to get x.  But, we want to stay "balanced" so we have to divide both sides by 5:\n\n5x / 5 = 5 / 5\nx = 1\n\nVoila!  Solved :)\n\nHope this helps.
706243
-2y+3=7y-42\n-2y+3-3=7y-42-3\n-2y=7y-45\n-2y-7y=7y-7y-45\n-9y=-45\n-9y/-9=-45/-9\ny=5
920287
Use substitution.\n\n7x - 3y = 13\n\n7x - 3(2x-3) = 13\n\n7x - 6x + 9 = 13\n\nx + 9 = 13\n\nx = 4\n\nThen go back and plug in to find y\n\ny = 2x - 3\n\ny = 2(4) - 3\n\ny = 8 - 3\n\ny = 5\n\n(4,5) is the answer.
1174662
2(x-4y+1)+3(-2+y-2)\n2x-8y+2-6+3y-6\n2x-8y+3y-6-6\n2x-5y-12\n\n2x-5y-12= answer\n\nHope this helps you.
225766
Given, x = 1/2y + 4 ............(i)\n and   2y +3 x = 12 ............(ii)\nSoln.: Multiply both side by 2 in eqn. (i)\n      2x = y + 8\ni.e.  2x - y = 8\ni. e. 4x - 2y = 16....(iii), multiplying both the side by 2\nNow, add eqn. (ii) and (iii) above,\n (2y+3x)+ (4x-2y)= 12 + 16\ni.e. 7x = 28\ni.e. x = 28/7 = 4.Ans.\nNow putting the value of x = 4 in either of the eqn. above, find out the value of y. Say, put value of 'x' in eqn.(ii),\n2y + 3x = 12\n2y + 3x4 = 12\n2y + 12 = 12\n2y = 12-12 = 0\nSo, y = 0/2 = 0 Ans.
567982
2*4y*3y-4x*7y=24y-4y*7y\n\nDo your order of operations. There are no brackets, parentheses, or exponents; skip directly to multiplication and division.\n\n24y^2-28xy=24y-28xy\n\nThen clear one side, making it equal to zero.\n\n24y^2-28xy-24y+28xy=0\n24y^2-24y=0\n\nThen, factor.\n24y(y-1)=0\n\nNow, y can equal 0 or 1.\n\n24*0(0-1)=0\n24*1(1-1)=0\n\nThe value of x is irrelevant.
220478
(x^2y - xy^2) = xy*(x-y) = 7*5 = 35
835686
4x^2 + 3y^2 = 4\n8x x' + 6y y' = 0\n8 x '' + 6 y'' = 0\n6y'' = -8x ''\ny '' = -4x / 3
923416
Sometimes I like math.  What you need to do is add 1 to both sides of the equation for x=3y-1\nyou will be left with (x+1)=3y you should then divide the 3 from both sides... afterwards you will have (x+1)divided by 3 equals y or (X+1)/3=y\nFor the other part x+2y=9 you should substitute (x+1)/3 for the "y"\nNow solve x + 2((x+1)/3)=9\nx+(2x/3) +(1/3)=9\ntake from there
714041
10x+4y+4\n\nor can be written as y= -2.5x-1
1027604
[(1/y)+4)]/[(1/y^2) -16]\nFirst simplfy the numerator.\n(1/y) +4\n= (1/y) +4y/y\n= (1+4y)/y\nthen simplify the denominator.\n(1/y^2) -16\n= (1/y^2) - 16y^2/y^2\n= (1-16y^2)/y^2 \n= [(1-4y)(1+4y)]/y^2\nNow multiply the numerator by the reciprocal of the denominator.\n(1/y+4)/(1/y*2)-16\n= [(1+4y)/y] * y^2/[(1-4y)(1+4y)]\n(1+4y) and y cancel\nAnswer: y/(1-4y)
638546
6-2y=7y+13\nor,-2y-7y=13-6\nor,-9y=9\nor,y=-1
826583
Yes, this is a difficult one.\nI'll keep trying, but don't hold your breath.\nAll I can say so far is that I could find\nonly one solution : (x, y) = (7,1).\nThere do not seem to be any more\nsolutions with x >= 8, and this is what\nneeds to be proved. So good luck with\nfinding someone who can do this.
934111
X + Y = 1\nX = 1 - Y\nsubstitute\n63x + 65y = 63.5\n63(1-y) +65y = 63.5\n63 - 63y +65y = 63.5\n63+2Y=63.5\n2Y=.5\nY=.25\nX= 1-.25\nX= .75
830938
Sqrt(2y+7) + 4 = y\n>>\n2y + 7 = (y - 4)^2\n>>\n(y - 4)^2 -2y -7 = 0\n>>\n(y - 4)^2 -2(y - 4) -15 = 0\n\ny - 4 = (2 + sqrt(4 +60))/2 or  (2 - sqrt(4 +60))/2\n>>\ny = 9 or 1\n\nBut if you require the sqrt(2y + 7) be positive, the only acceptable solution is 9.
381296
9y=11-x\n9y=11-(y+3) , replace x, since x=y+3\n10y=8       , +x to both sides, 8=11-3\ny=4/5       , divide both sized by 10, \nx=19/5      , x=(4/5)+3
496037
-3x + 5y = 8\nx + 2y = 1\n\n(-3x + 5y) + (x + 2y) = 8 + 1\n-3x + 5y + x + 2y = 9\n-2x + 7y = 9\n\n7y = 2x + 9\ny = (2/7)x + (9/7)\n\nx + 2y = 1\nx + 2((2/7)x + (9/7)) = 1\nx + (4/7)x + (18/7) = 1\n7x + 4x + 18 = 7\n11x + 18 = 7\n11x = -11\nx = -1\n\ny = (2/7)x + (9/7)\ny = (2/7)(-1) + (9/7)\ny = (-2 + 9)/7\ny = (7/7)\ny = 1\n\nx = -1\ny = 1