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(4*x-7)/5 = 5 // - 5
(4*x-7)/5-5 = 0
(4*x-7)/5+(-5*5)/5 = 0
4*x-5*5-7 = 0
4*x-32 = 0
(4*x-32)/5 = 0
(4*x-32)/5 = 0 // * 5
4*x-32 = 0
4*x-32 = 0 // + 32
4*x = 32 // : 4
x = 32/4
x = 8
x = 8
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