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(1/3)*(2*x-4) = 7 // - 7
(1/3)*(2*x-4)-7 = 0
1/3*(2*x-4)-7 = 0
1/3*(2*x-4)-7 = 0
2/3*x-25/3 = 0
2/3*x-25/3 = 0
2/3*x-25/3 = 0 // + 25/3
2/3*x = 25/3 // : 2/3
x = 25/3/2/3
x = 25/2
x = 25/2
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