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x in (-oo:+oo)
(-3/4)*(x+2/3) = (4/5)*(x-(1/2)) // - (4/5)*(x-(1/2))
(-3/4)*(x+2/3)-((4/5)*(x-(1/2))) = 0
(-3/4)*(x+2/3)+(-4/5)*(x-1/2) = 0
-3/4*(x+2/3)-4/5*(x-1/2) = 0
-3/4*(x+2/3)-4/5*(x-1/2) = 0
-31/20*x-1/10 = 0
-31/20*x-1/10 = 0
-31/20*x-1/10 = 0 // + 1/10
-31/20*x = 1/10 // : -31/20
x = 1/10/(-31/20)
x = -2/31
x = -2/31
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