3a+9a+3b-5a+2b=

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Solution for 3a+9a+3b-5a+2b= equation:


Simplifying
3a + 9a + 3b + -5a + 2b = 0

Reorder the terms:
3a + 9a + -5a + 3b + 2b = 0

Combine like terms: 3a + 9a = 12a
12a + -5a + 3b + 2b = 0

Combine like terms: 12a + -5a = 7a
7a + 3b + 2b = 0

Combine like terms: 3b + 2b = 5b
7a + 5b = 0

Solving
7a + 5b = 0

Solving for variable 'a'.

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

Add '-5b' to each side of the equation.
7a + 5b + -5b = 0 + -5b

Combine like terms: 5b + -5b = 0
7a + 0 = 0 + -5b
7a = 0 + -5b
Remove the zero:
7a = -5b

Divide each side by '7'.
a = -0.7142857143b

Simplifying
a = -0.7142857143b

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