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(-2/7)*x-(1/2) = (5/6)*x-74/7 // - (5/6)*x-74/7
(-2/7)*x-((5/6)*x)-(1/2)-(-74/7) = 0
(-2/7)*x+(-5/6)*x-1/2+74/7 = 0
141/14-47/42*x = 0 // - 141/14
-47/42*x = -141/14 // : -47/42
x = -141/14/(-47/42)
x = 9
x = 9
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