12+a=7

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Solution for 12+a=7 equation: 


Simplifying
12 + a = 7

Solving
12 + a = 7

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + a = 7 + -12

Combine like terms: 12 + -12 = 0
0 + a = 7 + -12
a = 7 + -12

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

Simplifying
a = -5

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