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39+(x+15)+x=180
We simplify the equation to the form, which is simple to understand
39+(x+15)+x=180
Remove unnecessary parentheses
+39+x+15+x=+180
We move all terms containing x to the left and all other terms to the right.
+1x+1x=+180-39-15
We simplify left and right side of the equation.
+2x=+126
We divide both sides of the equation by 2 to get x.
x=63
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