ab+3b-4ab+9b=0

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Solution for ab+3b-4ab+9b=0 equation:


Simplifying
ab + 3b + -4ab + 9b = 0

Reorder the terms:
ab + -4ab + 3b + 9b = 0

Combine like terms: ab + -4ab = -3ab
-3ab + 3b + 9b = 0

Combine like terms: 3b + 9b = 12b
-3ab + 12b = 0

Solving
-3ab + 12b = 0

Solving for variable 'a'.

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

Add '-12b' to each side of the equation.
-3ab + 12b + -12b = 0 + -12b

Combine like terms: 12b + -12b = 0
-3ab + 0 = 0 + -12b
-3ab = 0 + -12b
Remove the zero:
-3ab = -12b

Divide each side by '-3b'.
a = 4

Simplifying
a = 4

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