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6(x+5)-21=57
We simplify the equation to the form, which is simple to understand
6(x+5)-21=57
Reorder the terms in parentheses
+(+6x+30)-21=57
Remove unnecessary parentheses
+6x+30-21=+57
We move all terms containing x to the left and all other terms to the right.
+6x=+57-30+21
We simplify left and right side of the equation.
+6x=+48
We divide both sides of the equation by 6 to get x.
x=8
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