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(7/10)*x = 43/5 // - 43/5
(7/10)*x-(43/5) = 0
(7/10)*x-43/5 = 0
7/10*x-43/5 = 0 // + 43/5
7/10*x = 43/5 // : 7/10
x = 43/5/7/10
x = 86/7
x = 86/7
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