a-17+8=12

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Solution for a-17+8=12 equation: 


Simplifying
a + -17 + 8 = 12

Reorder the terms:
-17 + 8 + a = 12

Combine like terms: -17 + 8 = -9
-9 + a = 12

Solving
-9 + a = 12

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 9 + a = 12 + 9

Combine like terms: -9 + 9 = 0
0 + a = 12 + 9
a = 12 + 9

Combine like terms: 12 + 9 = 21
a = 21

Simplifying
a = 21

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