(7z)-(-7z)+(-7z)-(+7z)=

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Solution for (7z)-(-7z)+(-7z)-(+7z)= equation:


(7z)-(-7z)+(-7z)-(+7z)=0

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

Remove unnecessary parentheses
7z-(-7z)+(-7z)-(+7z)=0

Remove unnecessary parentheses
7z+7z+(-7z)-(+7z)=0

Remove unnecessary parentheses
+7z+7z-7z-(+7z+)=0

Remove unnecessary parentheses
7z+7z-7z-7z=0

We move all terms containing z to the left and all other terms to the right. 
+7z+7z-7z-7z=0

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

0=0

This equation is an identity, so all real numbers are solutions.

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