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(73+75+x)/3=77
We simplify the equation to the form, which is simple to understand
(73+75+x)/3=77
Simplifying terms in parentheses
(+148+1x)/3=77
Reorder the terms in parentheses
(+49.3333333333 + 0.333333333333x)=77
Remove unnecessary parentheses
+49.3333333333 + 0.333333333333x=77
We move all terms containing x to the left and all other terms to the right.
+ 0.333333333333x=+77-49.3333333333
We simplify left and right side of the equation.
+ 0.333333333333x=+27.6666666667
We divide both sides of the equation by 0.333333333333 to get x.
x=83.0000000001
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