4a-9b=12

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Solution for 4a-9b=12 equation: 


Simplifying
4a + -9b = 12

Solving
4a + -9b = 12

Solving for variable 'a'.

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

Add '9b' to each side of the equation.
4a + -9b + 9b = 12 + 9b

Combine like terms: -9b + 9b = 0
4a + 0 = 12 + 9b
4a = 12 + 9b

Divide each side by '4'.
a = 3 + 2.25b

Simplifying
a = 3 + 2.25b

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