3a-b=12

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Solution for 3a-b=12 equation: 


Simplifying
3a + -1b = 12

Solving
3a + -1b = 12

Solving for variable 'a'.

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

Add 'b' to each side of the equation.
3a + -1b + b = 12 + b

Combine like terms: -1b + b = 0
3a + 0 = 12 + b
3a = 12 + b

Divide each side by '3'.
a = 4 + 0.3333333333b

Simplifying
a = 4 + 0.3333333333b

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