2a-8=-9+7

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Solution for 2a-8=-9+7 equation: 


Simplifying
2a + -8 = -9 + 7

Reorder the terms:
-8 + 2a = -9 + 7

Combine like terms: -9 + 7 = -2
-8 + 2a = -2

Solving
-8 + 2a = -2

Solving for variable 'a'.

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

Add '8' to each side of the equation.
-8 + 8 + 2a = -2 + 8

Combine like terms: -8 + 8 = 0
0 + 2a = -2 + 8
2a = -2 + 8

Combine like terms: -2 + 8 = 6
2a = 6

Divide each side by '2'.
a = 3

Simplifying
a = 3

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