13a+9+9b+12a+-7b=

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Solution for 13a+9+9b+12a+-7b= equation:


Simplifying
13a + 9 + 9b + 12a + -7b = 0

Reorder the terms:
9 + 13a + 12a + 9b + -7b = 0

Combine like terms: 13a + 12a = 25a
9 + 25a + 9b + -7b = 0

Combine like terms: 9b + -7b = 2b
9 + 25a + 2b = 0

Solving
9 + 25a + 2b = 0

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 + 25a + -9 + 2b = 0 + -9

Reorder the terms:
9 + -9 + 25a + 2b = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 25a + 2b = 0 + -9
25a + 2b = 0 + -9

Combine like terms: 0 + -9 = -9
25a + 2b = -9

Add '-2b' to each side of the equation.
25a + 2b + -2b = -9 + -2b

Combine like terms: 2b + -2b = 0
25a + 0 = -9 + -2b
25a = -9 + -2b

Divide each side by '25'.
a = -0.36 + -0.08b

Simplifying
a = -0.36 + -0.08b

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