5-a=-7

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Solution for 5-a=-7 equation: 


Simplifying
5 + -1a = -7

Solving
5 + -1a = -7

Solving for variable 'a'.

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

Add '-5' to each side of the equation.
5 + -5 + -1a = -7 + -5

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

Combine like terms: -7 + -5 = -12
-1a = -12

Divide each side by '-1'.
a = 12

Simplifying
a = 12

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