2x=3-y
2y=12-x
y=3-2x
2(3-2x)=12-x
6-4x=12-x
-3x=6
x=-2
2(-2)=3-y
-4=3-y
y=7
x=-2 y=7
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10x - 5y + 2x - 3y = 12x - 8y
10x+2x-3y-4y=12x-7y
5y-2y= 3y+2 5y-2y-3y= 2 0y= 2
4x + 3y = 1y = 2x + 8 Take the first part: 4x + 3y = 1y 4x = 1y - 3y 4x = -2y x = -y/2 Substitute x in second part: 1y = 2x + 8 1y = -2y/2 + 8 1y = -1y + 8 2y = 8 y = 4 Substitute y into either part: 1y = 2x + 8 1(4) = 2x + 8 4 - 8 = 2x -4 = 2x x = -2 Therefore: x = -2 y = 4
2x+3y=12 ......1st equation 3x+2y=13 .......2nd equation ____________________________________ multiplying 1stt equation by 3 and 2nd equation by 2 3x(2x+3y=12) 2x(3x+2y=13) _______________________________ now the equations become 6x+9y=36 ...3rd 6x+4y=26 ....4th by solving both equation(substractinf 4th from 3rd) we get.. 5y=10 therefore y=2 and x=3