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(35-2-x)+(21-2-x)+(16-2-x)+(x)=54
We simplify the equation to the form, which is simple to understand
(35-2-x)+(21-2-x)+(16-2-x)+(x)=54
Simplifying terms in parentheses
(+33-1x)+(21-2-x)+(16-2-x)+(x)=54
Simplifying terms in parentheses
(+33-1x)+(+19-1x)+(16-2-x)+(x)=54
Simplifying terms in parentheses
(+33-1x)+(+19-1x)+(+14-1x)+(x)=54
Remove unnecessary parentheses
+33-1x+(+19-1x)+(+14-1x)+(x)=54
Remove unnecessary parentheses
+33-1x+19-1x+(+14-1x+)+(+x+)=+54
Remove unnecessary parentheses
+33-1x+19-1x+14-1x+(+x+)=+54
Remove unnecessary parentheses
+33-1x+19-1x+14-1x+x=+54
We move all terms containing x to the left and all other terms to the right.
-1x-1x-1x+1x=+54-33-19-14
We simplify left and right side of the equation.
-2x=-12
We divide both sides of the equation by -2 to get x.
x=6
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