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x+(2x+20)+2(2x+20)=550
We simplify the equation to the form, which is simple to understand
x+(2x+20)+2(2x+20)=550
Remove unnecessary parentheses
+x+2x+20+2+*(+2x+20+)=+550
Reorder the terms in parentheses
x2x+20+(+4x+40)=550
Remove unnecessary parentheses
+x+2x+20+4x+40=+550
We move all terms containing x to the left and all other terms to the right.
+1x+2x+4x=+550-20-40
We simplify left and right side of the equation.
+7x=+490
We divide both sides of the equation by 7 to get x.
x=70
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