(-7)(-5)+(-7)(-4)=

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Solution for (-7)(-5)+(-7)(-4)= equation:


(-7)(-5)+(-7)(-4)=0

We simplify the equation to the form, which is simple to understand 
(-7)*(-5)+(-7)*(-4)=0

Reorder the terms in parentheses
multiplication of parentheses
(+35)+(-7)*(-4)=0



Remove unnecessary parentheses
+35+(-7)*(-4)=0

Reorder the terms in parentheses
multiplication of parentheses
+35+(+28)=0



Remove unnecessary parentheses
+35+28=0

We move all terms containing  to the left and all other terms to the right. 
0=0-35-28

We simplify left and right side of the equation. 
0=-63

0=-63

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

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