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x in (-oo:+oo)
(-4/9)*x = 3/4 // - 3/4
(-4/9)*x-(3/4) = 0
(-4/9)*x-3/4 = 0
-4/9*x-3/4 = 0 // + 3/4
-4/9*x = 3/4 // : -4/9
x = 3/4/(-4/9)
x = -27/16
x = -27/16
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