(-21)+(-13)+20=

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Solution for (-21)+(-13)+20= equation:


(-21)+(-13)+20=0

We simplify the equation to the form, which is simple to understand 
(-21)+(-13)+20=0

Remove unnecessary parentheses
-21+(-13)+20=0

Remove unnecessary parentheses
-21-13+20=0

We move all terms containing  to the left and all other terms to the right. 
0=0+21+13-20

We simplify left and right side of the equation. 
0=+14

0=14

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

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