10+a=9

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Solution for 10+a=9 equation: 


Simplifying
10 + a = 9

Solving
10 + a = 9

Solving for variable 'a'.

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

Add '-10' to each side of the equation.
10 + -10 + a = 9 + -10

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

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

Simplifying
a = -1

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