A+20a-12a+-6a=18

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Solution for A+20a-12a+-6a=18 equation: 


Simplifying
A + 20a + -12a + -6a = 18

Combine like terms: 20a + -12a = 8a
A + 8a + -6a = 18

Combine like terms: 8a + -6a = 2a
A + 2a = 18

Solving
A + 2a = 18

Solving for variable 'A'.

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

Add '-2a' to each side of the equation.
A + 2a + -2a = 18 + -2a

Combine like terms: 2a + -2a = 0
A + 0 = 18 + -2a
A = 18 + -2a

Simplifying
A = 18 + -2a

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