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x in (-oo:+oo)
(-3/4)*x = -4/3 // + -4/3
(-3/4)*x-(-4/3) = 0
(-3/4)*x+4/3 = 0
4/3-3/4*x = 0 // - 4/3
-3/4*x = -4/3 // : -3/4
x = -4/3/(-3/4)
x = 16/9
x = 16/9
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