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(4/7)*x-6 = -34/7 // + -34/7
(4/7)*x-(-34/7)-6 = 0
(4/7)*x+34/7-6 = 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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