-42-4(-21)=

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Solution for -42-4(-21)= equation:


-42-4(-21)=0

We simplify the equation to the form, which is simple to understand 
-42-4(-21)=0

Reorder the terms in parentheses
-42+(+84)=0

Remove unnecessary parentheses
-42+84=0

We move all terms containing  to the left and all other terms to the right. 
0=0+42-84

We simplify left and right side of the equation. 
0=-42

0=-42

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

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