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