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(1/2)*(4*x-6) = 7 // - 7
(1/2)*(4*x-6)-7 = 0
1/2*(4*x-6)-7 = 0
1/2*(4*x-6)-7 = 0
2*x-10 = 0
2*x-10 = 0
2*x-10 = 0 // + 10
2*x = 10 // : 2
x = 10/2
x = 5
x = 5
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