[-18+3]=

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Solution for [-18+3]= equation:


[-18+3]=0

We simplify the equation to the form, which is simple to understand 
(-18+3)=0

Remove unnecessary parentheses
-15=0

We move all terms containing  to the left and all other terms to the right. 
0=0+15

We simplify left and right side of the equation. 
0=+15

0=15

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

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