-9=6a+3a

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Solution for -9=6a+3a equation:


Simplifying
-9 = 6a + 3a

Combine like terms: 6a + 3a = 9a
-9 = 9a

Solving
-9 = 9a

Solving for variable 'a'.

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

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

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

Add '9' to each side of the equation.
-9 + 9 + -9a = 0 + 9

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

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

Divide each side by '-9'.
a = -1

Simplifying
a = -1

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