9y - 9 = -117
9y - 9 + 9 = -117 + 9
9y = -108
9y/9 = -108/9
y= -12
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9
9y + 5 = 0 (-5 on both sides)9y = -5 (/9 on both sides)y = -5/9
3x-3y=-9 and 9x-9y=-27 both simplifies to x-y=-3.
13 x 9 = 117
y = 3 in the equation 31 = 4 - 9y Solve for y. 31 - 4 = 4 - 9y - 4 Simplify 27 = 9y Divide both sides by 9 to get the term y by itself on one side of the equation. 27 / 9 = 9y / 9 Simplify 3 = y