Question 833949
Y=2x-10
2y=x-8 
Y=-x+4
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y is solved for, so sub for y in the 1st eqn
2y = x - 8
2(x-4) = x-8
2x-8 = x-8
x-8 = -8
x = 0
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y = 4
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Y=3x 
2y=x+1
Same as above
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-2x-y=7 
X+2y=14
Solve for x or y in 1 eqn, then sub into the other.
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Y=3x-14 
2x-3y=14
Same as #1
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Y=1/2x-7/2
-3x-2y=5.5
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X+3y=7.5 
6x-4y=54
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-9x+2y=-69 
Y=-x/2-4
-2x-y=-5