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(4/7)*x-2 = -2/7 // + -2/7
(4/7)*x-(-2/7)-2 = 0
(4/7)*x+2/7-2 = 0
4/7*x-12/7 = 0 // + 12/7
4/7*x = 12/7 // : 4/7
x = 12/7/4/7
x = 3
x = 3
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