3(x+a)=b

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Solution for 3(x+a)=b equation: 


Simplifying
3(x + a) = b

Reorder the terms:
3(a + x) = b
(a * 3 + x * 3) = b
(3a + 3x) = b

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

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

Divide each side by '3'.
a = 0.3333333333b + -1x

Simplifying
a = 0.3333333333b + -1x

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