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(1/3)*(2*x-7) = 8 // - 8
(1/3)*(2*x-7)-8 = 0
1/3*(2*x-7)-8 = 0
1/3*(2*x-7)-8 = 0
2/3*x-31/3 = 0
2/3*x-31/3 = 0
2/3*x-31/3 = 0 // + 31/3
2/3*x = 31/3 // : 2/3
x = 31/3/2/3
x = 31/2
x = 31/2
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