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x in (-oo:+oo)
(-3/8)*x+4 = 10 // - 10
(-3/8)*x-10+4 = 0
-3/8*x-6 = 0 // + 6
-3/8*x = 6 // : -3/8
x = 6/(-3/8)
x = -16
x = -16
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