(21+9)(-5)=

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Solution for (21+9)(-5)= equation:


(21+9)(-5)=0

We simplify the equation to the form, which is simple to understand 
(21+9)*(-5)=0

Simplifying terms in parentheses
(+30)*(-5)=0

Reorder the terms in parentheses
multiplication of parentheses
(-150)=0



Remove unnecessary parentheses
-150=0

We move all terms containing  to the left and all other terms to the right. 
0=0+150

We simplify left and right side of the equation. 
0=+150

0=150

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

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