solve equations by add. method: 11x-8y=27, 3x+5y=-1?
155074
I get the same y=-92/79, x=127/79\n\nI thought this couldn't be right.
94721
y= 2x + 11 and y=-x + 5 \n\n2x + 11 = -x + 5\n3x + 11 = 5\n3x = -6\nx = -2\n\ny = -(-2) + 5\ny = 2 + 5\ny = 7\n\n(-2, 7)
987218
x+3y=18  ----> x=-3y+18\n5x+10y=-20\n\nplug in \n5(-3y+18)+10y =-20\n\ndistibute\n-15y + 90 + 10y =-20\n\nisolate the y's by subtracting 90 to both sides\n-15y + 90 + 10y =-20\n         - 90             -90\n-15y + 0  +  10y =-110\n \nadd the y's together\n-5y = -110\n\ndivide -5 to both sides\n-5y/-5 = -110/-5\n\nY is equal to -110/-5 which is equal to 22\n\nnow plug y into\nx=-3y+18\n\nx= -3(22) + 18\nx= -66+18\nx= - 47\n\nx=-47 y = 22
892382
To solve the first one, divide each part of the first equation by two, so 2x-3y=-13; since -2x+3y = 13, adding the two equations gives 0x+0y=0.  No help.  Try substitution.\nFrom the first equation, 4x = 6y-26; x = 1.5y - 6.5\nsubstitute into the second equation -2(1.5y-6.5) + 3y = 13; -3y +13 + 3y = 13; 13=13.  Still no help.\nBoth equations are equivalent; the line that represents them is the solution.\n\nProblem two:\nSubtract equation 2 from equation 1.\n3x-3x+2y-3 = 6 - y\n2y-3 = 6-y\n3y = 9\ny = 3\n3x+6=6\nx=0\nchecking\n3x+3=y=3\n3x=0\nx=0
361972
if you add your two equations you get 3y^2=27\n\nthat is y^2 = 9\n\ni.e y = ± 3\n\nthen since x^2 = 13 - y^2\n           x^2 = 4\n           x = ± 2\n\nhence there are four soltions\nx=2 y=3, x=-2 y=3, x=2 y=-3, x=-2 y=-3
860625
(10x+8) - (5x+4)\n= 10x - 5x +8 -4\n= 5x + 4
643397
(8y^3 + 27)/(2xy - 10y + 3x - 15)\n((2y + 3)(4y^2 - 6y + 9))/((2xy - 10y) + (3x - 15))\n((2y + 3)(4y^2 - 6y + 9))/(2y(x - 5) + 3(x - 5))\n((2y + 3)(4y^2 - 6y + 9))/((2y + 3)(x - 5))\nthe (2y + 3)s cancel out\n(4y^2 - 6y + 9)/(x - 5)\n\nANS : (4y^2 - 6y + 9)/(x - 5)
959550
x-5y=4, therefore x=4+5y and you plug that into the other problem to get 4(4+5y)+8y=-5, 16+20y+8y=-5, 28y=-21, y=-21/28 or -3/4, then plug -3/4 into one of the equations for y and solve for x, although I'm afraid it's been to long for me to remember the answer to dependant, independant, etc.
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.
247328
wrtie the eqations as \n3x-2y=-8      \n9x-3y=-21\nmutliply first equation by 3\n9x-18y=-72\n9x-3y=-21\nnow deduct first equation from 2\nu get \ny=25.5\nu can calculate x now\nbut kid see one thing never ask direct questions see solved examples fom the book and then try solving the question by ur own \ngetting the solution will not help u to score in examination\ncheeeeers
191645
3x+y=5 ----(1)\nx-2y=11----(2)\n\nfrom eqn (1)\ny=5-3x-----(3)\nNow substituting value of y in eqn (2) we get \nx-2(5-3x)=11\n7x-10=11\n7x=21\ntherfore x=3\nNow substituting value of x in eqn (3) we get \ny=5-3(3)\ntherefore y=-4\n\nX=3,Y=-4
334051
from x + 8y = 2\nwe get x = 2 - 8y\nsubstituting in the other equation, we get\n3( 2 - 8y ) + 3y = 2\n=> 6 - 24y + 3y = 2\ncollecting like terms:\n=> -21y = -4\n=> y = 4/21
605260
Multiply the first equation by x, multiply the second equation by -y, then add the two equations together.\n1 + xy = 5x\n-xy - 1 = -8y\n0 = 5x - 8y\nAdd 8y to each side\n8y = 5x\nDivide both sides by 5y\n8/5 = x/y\nAnswer: 8/5
975557
5x-3y=-12\n-3y=-5x-12\nmultiplying by -1\n3y=5x+12\nm=5/3\nb=12/3=4\n\n2.y=3x+5\n\n3.y+5/5+5=x+3/4+3\ny+5/10=x+3/7\nmultiplying by 70\n7(y+5)=10(x+3)\n7y+35=10x+30\nadding -7y\n35=10x-7y+30\nadding -35\n10x-7y-5=0
210403
8x-5x+3=x-7+10\n8x-5x+3-x=-7+10\n8x-5x-x=-7+10-3\n3x-x=3-3\n2x=0
485118
2x = 3x+11\n2x-3x = 11\n-1x = 11\nx = -11
769967
removing the brackets\n18+3y=4y-16-y\nsimplifying\n18+3y=3y-16\nadding 16\n34+3y=3y\nadding -3y\n34=0\nwhich is absurd\nso the equation cannot be solved