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(2*(3*x+4))/4 = 7 // - 7
(2*(3*x+4))/4-7 = 0
(2*(3*x+4))/4+(-7*4)/4 = 0
2*(3*x+4)-7*4 = 0
6*x-20 = 0
(6*x-20)/4 = 0
(6*x-20)/4 = 0 // * 4
6*x-20 = 0
6*x-20 = 0 // + 20
6*x = 20 // : 6
x = 20/6
x = 10/3
x = 10/3
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