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x in (-oo:+oo)
(-5/6)*((-2/5)*x+2) = -5 // + 5
(-5/6)*((-2/5)*x+2)+5 = 0
5-5/6*(2-2/5*x) = 0
5-5/6*(2-2/5*x) = 0
1/3*x+10/3 = 0
1/3*x+10/3 = 0
1/3*x+10/3 = 0 // - 10/3
1/3*x = -10/3 // : 1/3
x = -10/3/1/3
x = -10
x = -10
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