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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