7-7-z=-5

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Solution for 7-7-z=-5 equation: 


Simplifying
7 + -7 + -1z = -5

Combine like terms: 7 + -7 = 0
0 + -1z = -5
-1z = -5

Solving
-1z = -5

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Divide each side by '-1'.
z = 5

Simplifying
z = 5

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