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(2/7)*x-10 = -62/7 // + -62/7
(2/7)*x-(-62/7)-10 = 0
(2/7)*x+62/7-10 = 0
2/7*x-8/7 = 0 // + 8/7
2/7*x = 8/7 // : 2/7
x = 8/7/2/7
x = 4
x = 4
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