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2x-y=3 2/3x-y=-1
y= -4x-7 y=3x 3x= -4x-7 3x+4x=7 7x=7 x=1
-3x = 3 + y 3 + y - 5y = -21 -4y = -24 y = 6 x = -3
2x + 5y = 2-3x - y = -3from the second equation:-y = -3 + 3xy = 3 - 3xsubstitute this value in the first equation:2x + 5(3-3x) = 22x + 15 - 15x = 2-13x + 15 = 2-13x = 2 - 15-13x = -13so, x = 1Now, solve for y :y = 3 - 3xy = 3 - 3 (1)y = zero
3x + 2y = 12 ie 2y = 12 - 3x so y = 6 - 3x/2