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x in (-oo:+oo)
-2/3 = (3/5)*x-(5/4) // - (3/5)*x-(5/4)
5/4-((3/5)*x)-2/3 = 0
(-3/5)*x-2/3+5/4 = 0
7/12-3/5*x = 0 // - 7/12
-3/5*x = -7/12 // : -3/5
x = -7/12/(-3/5)
x = 35/36
x = 35/36
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