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(1/2)*(5*x-2) = 7 // - 7
(1/2)*(5*x-2)-7 = 0
1/2*(5*x-2)-7 = 0
1/2*(5*x-2)-7 = 0
5/2*x-8 = 0
5/2*x-8 = 0
5/2*x-8 = 0 // + 8
5/2*x = 8 // : 5/2
x = 8/5/2
x = 16/5
x = 16/5
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