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d.18
y=-2
x=3
2x - 4y = 14 | x3 | 6x - 12y = 42 -
18y = -36
y = -36/18 = -2
3x + 3y = 3
3x + 3(-2) = 3
3x + (-6) = 3
3x = 3 +6
3x = 9
x = 9/3 = 3
= 4x - 3y
= 4(3) - 3(-2)
= 12 + 6
= 18 ( D )