8y + 4 + 4y +8 = 15y - 9Its best to group them up first so it doesnt look big.12y + 12 = 15y - 9Then get y onto one side, best done by taking 12y off both sides:12 = 3y - 9Then add 9 to both sides to get y on its own on both sides:21 = 3yDivide by 3:y = 7
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