3a=a+b

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Solution for 3a=a+b equation:


Simplifying
3a = a + b

Solving
3a = a + b

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
3a + -1a = a + -1a + b

Combine like terms: 3a + -1a = 2a
2a = a + -1a + b

Combine like terms: a + -1a = 0
2a = 0 + b
2a = b

Divide each side by '2'.
a = 0.5b

Simplifying
a = 0.5b

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