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(3/7)*x+2 = 149/70 // - 149/70
(3/7)*x-(149/70)+2 = 0
(3/7)*x-149/70+2 = 0
3/7*x-9/70 = 0 // + 9/70
3/7*x = 9/70 // : 3/7
x = 9/70/3/7
x = 3/10
x = 3/10
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