I know the answer is 3, but how do you get that answer?
2y + y - 3 = 18 -2y - 6 (distribute the -2 to the y and 3)
3y - 3 = 12 - 2y
5y = 15 (add 2y to both sides and add 3 to both sides)
y = 3
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2y + y - 3 = 18 -2y - 6 (distribute the -2 to the y and 3)
3y - 3 = 12 - 2y
5y = 15 (add 2y to both sides and add 3 to both sides)
y = 3