(-3)(7)+(-3)(3)=

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


(-3)(7)+(-3)(3)=0

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

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



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

Reorder the terms in parentheses
multiplication of parentheses
-21+(-9)=0



Remove unnecessary parentheses
-21-9=0

We move all terms containing  to the left and all other terms to the right. 
0=0+21+9

We simplify left and right side of the equation. 
0=+30

0=30

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

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