3(7)+(-3)=

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Solution for 3(7)+(-3)= equation:


3(7)+(-3)=0

We simplify the equation to the form, which is simple to understand 
3(7)+(-3)=0

Reorder the terms in parentheses
+(+21)+(-3)=0

Remove unnecessary parentheses
+21+(-3+)=0

Remove unnecessary parentheses
+21-3=0

We move all terms containing  to the left and all other terms to the right. 
0=0-21+3

We simplify left and right side of the equation. 
0=-18

0=-18

The left and right sides are not equal, therefore there is no solution. This equation is invalid.

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