15+a=3

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Solution for 15+a=3 equation: 


Simplifying
15 + a = 3

Solving
15 + a = 3

Solving for variable 'a'.

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

Add '-15' to each side of the equation.
15 + -15 + a = 3 + -15

Combine like terms: 15 + -15 = 0
0 + a = 3 + -15
a = 3 + -15

Combine like terms: 3 + -15 = -12
a = -12

Simplifying
a = -12

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