(-40+70)+(-3-6)=

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Solution for (-40+70)+(-3-6)= equation:


(-40+70)+(-3-6)=0

We simplify the equation to the form, which is simple to understand 
(-40+70)+(-3-6)=0

Simplifying terms in parentheses
(+30)+(-3-6)=0

Simplifying terms in parentheses
(+30)+(-9)=0

Remove unnecessary parentheses
+30+(-9)=0

Remove unnecessary parentheses
+30-9=0

We move all terms containing  to the left and all other terms to the right. 
0=0-30+9

We simplify left and right side of the equation. 
0=-21

0=-21

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

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