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(1/3)*(9*x-15)-2 = 2*x+5 // - 2*x+5
(1/3)*(9*x-15)-(2*x)-5-2 = 0
(1/3)*(9*x-15)-2*x-5-2 = 0
1/3*(9*x-15)-2*x-5-2 = 0
1/3*(9*x-15)-2*x-5-2 = 0
x-5-5-2 = 0
x-10-2 = 0
x-12 = 0
x-12 = 0
x-12 = 0 // + 12
x = 12
x = 12
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