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x=1/2(80+30)
We simplify the equation to the form, which is simple to understand
x=1/2(80+30)
Reorder the terms in parentheses
x=+(+55)
Remove unnecessary parentheses
+x=+55
We move all terms containing x to the left and all other terms to the right.
+1x=+55
We simplify left and right side of the equation.
+1x=+55
We divide both sides of the equation by 1 to get x.
x=55
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