-6=9-a

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Solution for -6=9-a equation:


Simplifying
-6 = 9 + -1a

Solving
-6 = 9 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
-6 + a = 9 + -1a + a

Combine like terms: -1a + a = 0
-6 + a = 9 + 0
-6 + a = 9

Add '6' to each side of the equation.
-6 + 6 + a = 9 + 6

Combine like terms: -6 + 6 = 0
0 + a = 9 + 6
a = 9 + 6

Combine like terms: 9 + 6 = 15
a = 15

Simplifying
a = 15

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