-2a+6a=9+7a

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Solution for -2a+6a=9+7a equation: 


Simplifying
-2a + 6a = 9 + 7a

Combine like terms: -2a + 6a = 4a
4a = 9 + 7a

Solving
4a = 9 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
4a + -7a = 9 + 7a + -7a

Combine like terms: 4a + -7a = -3a
-3a = 9 + 7a + -7a

Combine like terms: 7a + -7a = 0
-3a = 9 + 0
-3a = 9

Divide each side by '-3'.
a = -3

Simplifying
a = -3

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