a+-9=-10

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Solution for a+-9=-10 equation: 


Simplifying
a + -9 = -10

Reorder the terms:
-9 + a = -10

Solving
-9 + a = -10

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 = -10 + 9

Combine like terms: -9 + 9 = 0
0 + a = -10 + 9
a = -10 + 9

Combine like terms: -10 + 9 = -1
a = -1

Simplifying
a = -1

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