3x-a=b

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Solution for 3x-a=b equation: 


Simplifying
3x + -1a = b

Reorder the terms:
-1a + 3x = b

Solving
-1a + 3x = b

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.
-1a + 3x + -3x = b + -3x

Combine like terms: 3x + -3x = 0
-1a + 0 = b + -3x
-1a = b + -3x

Divide each side by '-1'.
a = -1b + 3x

Simplifying
a = -1b + 3x

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