3(7x+3)+4=21x+13

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Solution for 3(7x+3)+4=21x+13 equation:


3(7x+3)+4=21x+13

We simplify the equation to the form, which is simple to understand 
3(7x+3)+4=21x+13

Reorder the terms in parentheses
+(+21x+9)+4=21x+13

Remove unnecessary parentheses
+21x+9+4=+21x+13

We move all terms containing x to the left and all other terms to the right. 
+21x-21x=+13-9-4

We simplify left and right side of the equation. 
0x=0

0=0

This equation is an identity, so all real numbers are solutions.

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