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2x-7+x+(2x-7)+4=80
We simplify the equation to the form, which is simple to understand
2x-7+x+(2x-7)+4=80
Remove unnecessary parentheses
+2x-7+x+2x-7+4=+80
We move all terms containing x to the left and all other terms to the right.
+2x+1x+2x=+80+7+7-4
We simplify left and right side of the equation.
+5x=+90
We divide both sides of the equation by 5 to get x.
x=18
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