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-(7*x)-2 = (6/7)*x+261/7 // - (6/7)*x+261/7
-(7*x)-((6/7)*x)-(261/7)-2 = 0
(-6/7)*x-7*x-261/7-2 = 0
-55/7*x-275/7 = 0 // + 275/7
-55/7*x = 275/7 // : -55/7
x = 275/7/(-55/7)
x = -5
x = -5
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