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(1/2)*(4*y+8)+(2/3)*(9*y-12) = 16 // - 16
(1/2)*(4*y+8)+(2/3)*(9*y-12)-16 = 0
1/2*(4*y+8)+2/3*(9*y-12)-16 = 0
1/2*(4*y+8)+2/3*(9*y-12)-16 = 0
8*y-16-4 = 0
8*y-20 = 0
8*y-20 = 0
8*y-20 = 0 // + 20
8*y = 20 // : 8
y = 20/8
y = 5/2
y = 5/2
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