15-2a-8=13

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Solution for 15-2a-8=13 equation:


Simplifying
15 + -2a + -8 = 13

Reorder the terms:
15 + -8 + -2a = 13

Combine like terms: 15 + -8 = 7
7 + -2a = 13

Solving
7 + -2a = 13

Solving for variable 'a'.

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

Add '-7' to each side of the equation.
7 + -7 + -2a = 13 + -7

Combine like terms: 7 + -7 = 0
0 + -2a = 13 + -7
-2a = 13 + -7

Combine like terms: 13 + -7 = 6
-2a = 6

Divide each side by '-2'.
a = -3

Simplifying
a = -3

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