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(1/6)*(2*x-8) = 7 // - 7
(1/6)*(2*x-8)-7 = 0
1/6*(2*x-8)-7 = 0
1/6*(2*x-8)-7 = 0
1/3*x-25/3 = 0
1/3*x-25/3 = 0
1/3*x-25/3 = 0 // + 25/3
1/3*x = 25/3 // : 1/3
x = 25/3/1/3
x = 25
x = 25
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