21-(8-9)=87

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Solution for 21-(8-9)=87 equation:


21-(8-9)=87

We simplify the equation to the form, which is simple to understand 
21-(8-9)=87

Remove unnecessary parentheses
21+1=87

We move all terms containing  to the left and all other terms to the right. 
0=+87-21-1

We simplify left and right side of the equation. 
0=+65

0=65

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

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