-13+2*21=11

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Solution for -13+2*21=11 equation:


-13+2*21=11

We simplify the equation to the form, which is simple to understand 
-13+2*21=11

We move all terms containing  to the left and all other terms to the right. 
0=+11+13-42

We simplify left and right side of the equation. 
0=-18

0=-18

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

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