a+b-9=3b

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Solution for a+b-9=3b equation:


Simplifying
a + b + -9 = 3b

Reorder the terms:
-9 + a + b = 3b

Solving
-9 + a + b = 3b

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + a + 9 + b = 9 + 3b

Reorder the terms:
-9 + 9 + a + b = 9 + 3b

Combine like terms: -9 + 9 = 0
0 + a + b = 9 + 3b
a + b = 9 + 3b

Add '-1b' to each side of the equation.
a + b + -1b = 9 + 3b + -1b

Combine like terms: b + -1b = 0
a + 0 = 9 + 3b + -1b
a = 9 + 3b + -1b

Combine like terms: 3b + -1b = 2b
a = 9 + 2b

Simplifying
a = 9 + 2b

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