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(1/7)*(24-3) = (1/6)*(5*x+7*x-30) // - (1/6)*(5*x+7*x-30)
(1/7)*(24-3)-((1/6)*(5*x+7*x-30)) = 0
(-1/6)*(5*x+7*x-30)+(1/7)*(24-3) = 0
3-1/6*(12*x-30) = 0
3-1/6*(12*x-30) = 0
8-2*x = 0
8-2*x = 0
8-2*x = 0 // - 8
-2*x = -8 // : -2
x = -8/(-2)
x = 4
x = 4
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