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x=1/2(71+86)
We simplify the equation to the form, which is simple to understand
x=1/2(71+86)
Reorder the terms in parentheses
x=+(+78.5)
Remove unnecessary parentheses
+x=+78.5
We move all terms containing x to the left and all other terms to the right.
+1x=+78.5
We simplify left and right side of the equation.
+1x=+78.5
We divide both sides of the equation by 1 to get x.
x=78.5
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