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(4/7)*x-8 = -284/35 // + -284/35
(4/7)*x-(-284/35)-8 = 0
(4/7)*x+284/35-8 = 0
4/7*x+4/35 = 0 // - 4/35
4/7*x = -4/35 // : 4/7
x = -4/35/4/7
x = -1/5
x = -1/5
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