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