2(-21)-5+8=

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Solution for 2(-21)-5+8= equation:


2(-21)-5+8=0

We simplify the equation to the form, which is simple to understand 
2(-21)-5+8=0

Reorder the terms in parentheses
+(-42)-5+8=0

Remove unnecessary parentheses
-42-5+8=0

We move all terms containing  to the left and all other terms to the right. 
0=0+42+5-8

We simplify left and right side of the equation. 
0=+39

0=39

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

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