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(7*x)/12 = 35/4 // - 35/4
(7*x)/12-(35/4) = 0
(7*x)/12-35/4 = 0
7/12*x-35/4 = 0 // + 35/4
7/12*x = 35/4 // : 7/12
x = 35/4/7/12
x = 15
x = 15
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