a+3x=20

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Solution for a+3x=20 equation: 


Simplifying
a + 3x = 20

Solving
a + 3x = 20

Solving for variable 'a'.

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

Add '-3x' to each side of the equation.
a + 3x + -3x = 20 + -3x

Combine like terms: 3x + -3x = 0
a + 0 = 20 + -3x
a = 20 + -3x

Simplifying
a = 20 + -3x

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