(42-33)-(-7+12)=

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Solution for (42-33)-(-7+12)= equation:


(42-33)-(-7+12)=0

We simplify the equation to the form, which is simple to understand 
(42-33)-(-7+12)=0

Simplifying terms in parentheses
(+9)-(-7+12)=0

Simplifying terms in parentheses
(+9)-(+5)=0

Remove unnecessary parentheses
+9-(+5)=0

Remove unnecessary parentheses
+9-5=0

We move all terms containing  to the left and all other terms to the right. 
0=0-9+5

We simplify left and right side of the equation. 
0=-4

0=-4

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

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