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x in (-oo:+oo)
2*x-(3*((3*3)/5)*x)-7 = 1 // - 1
2*x-(3*((3*3)/5)*x)-7-1 = 0
2*x+(-27/5)*x-7-1 = 0
-17/5*x-8 = 0 // + 8
-17/5*x = 8 // : -17/5
x = 8/(-17/5)
x = -40/17
x = -40/17
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