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-2*x-4 = -((4/7)*x)-61/14 // + -((4/7)*x)-61/14
(4/7)*x-2*x-(-61/14)-4 = 0
(4/7)*x-2*x+61/14-4 = 0
5/14-10/7*x = 0 // - 5/14
-10/7*x = -5/14 // : -10/7
x = -5/14/(-10/7)
x = 1/4
x = 1/4
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