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x in (-oo:+oo)
(-2*x)/9 = -3/4 // + -3/4
(-2*x)/9-(-3/4) = 0
(-2*x)/9+3/4 = 0
3/4-2/9*x = 0 // - 3/4
-2/9*x = -3/4 // : -2/9
x = -3/4/(-2/9)
x = 27/8
x = 27/8
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