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(4/7)*x+5 = 43/7 // - 43/7
(4/7)*x-(43/7)+5 = 0
(4/7)*x-43/7+5 = 0
4/7*x-8/7 = 0 // + 8/7
4/7*x = 8/7 // : 4/7
x = 8/7/4/7
x = 2
x = 2
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