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(4/7)*x+8 = -2*x-(124/7) // + -2*x-(124/7)
(4/7)*x-(-2*x)+124/7+8 = 0
(4/7)*x+2*x+124/7+8 = 0
18/7*x+180/7 = 0 // - 180/7
18/7*x = -180/7 // : 18/7
x = -180/7/18/7
x = -10
x = -10
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