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x in (-oo:+oo)
(-1/3)*x+2 = -2*x-3 // + -2*x-3
(-1/3)*x-(-2*x)+2+3 = 0
(-1/3)*x+2*x+2+3 = 0
5/3*x+5 = 0 // - 5
5/3*x = -5 // : 5/3
x = -5/5/3
x = -3
x = -3
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