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(x-20)+2(x+10)-5(x-10)=x-80
We simplify the equation to the form, which is simple to understand
(x-20)+2(x+10)-5(x-10)=x-80
Remove unnecessary parentheses
x-20+2*(x+10)-5*(x-10)=x-80
Reorder the terms in parentheses
x-20+(+2x+20)-5*(x-10)=x-80
Remove unnecessary parentheses
+x-20+2x+20-5+*(+x-10+)=+x-80
Reorder the terms in parentheses
x-20+2x+20+(-5x+50)=x-80
Remove unnecessary parentheses
+x-20+2x+20-5x+50=+x-80
We move all terms containing x to the left and all other terms to the right.
+1x+2x-5x-1x=-80+20-20-50
We simplify left and right side of the equation.
-3x=-130
We divide both sides of the equation by -3 to get x.
x=43.3333333333
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