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x in (-oo:+oo)
7*(-2*x-3) = -133 // + 133
7*(-2*x-3)+133 = 0
7*(-2*x-3)+133 = 0
112-14*x = 0
112-14*x = 0
112-14*x = 0 // - 112
-14*x = -112 // : -14
x = -112/(-14)
x = 8
x = 8
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