A+9a-6a+4a=20

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Solution for A+9a-6a+4a=20 equation: 


Simplifying
A + 9a + -6a + 4a = 20

Combine like terms: 9a + -6a = 3a
A + 3a + 4a = 20

Combine like terms: 3a + 4a = 7a
A + 7a = 20

Solving
A + 7a = 20

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.
A + 7a + -7a = 20 + -7a

Combine like terms: 7a + -7a = 0
A + 0 = 20 + -7a
A = 20 + -7a

Simplifying
A = 20 + -7a

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