15+2-a=

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Solution for 15+2-a= equation:


Simplifying
15 + 2 + -1a = 0

Combine like terms: 15 + 2 = 17
17 + -1a = 0

Solving
17 + -1a = 0

Solving for variable 'a'.

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

Add '-17' to each side of the equation.
17 + -17 + -1a = 0 + -17

Combine like terms: 17 + -17 = 0
0 + -1a = 0 + -17
-1a = 0 + -17

Combine like terms: 0 + -17 = -17
-1a = -17

Divide each side by '-1'.
a = 17

Simplifying
a = 17

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