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7(2n+3)=14n+21
We simplify the equation to the form, which is simple to understand
7(2n+3)=14n+21
Reorder the terms in parentheses
+(+14n+21)=14n+21
Remove unnecessary parentheses
+14n+21=+14n+21
We move all terms containing n to the left and all other terms to the right.
+14n-14n=+21-21
We simplify left and right side of the equation.
n=0
0=0
This equation is an identity, so all real numbers are solutions.
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