12y+3=9y-15
3y=-18
y=-6
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-6x + 12y = -102 -6x = -12y - 102 x = 2y + 17
3y + 4z + 12y = 3y -3y -3y ------------------------- 4z + 12y = 0 divide everything by 4 z + 3y = 0 -3y -3y z = -3y
y = 11
5x=11y
Answer:12y=132y=132/12=11