15a-9a+7-4a+5b-9=

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Solution for 15a-9a+7-4a+5b-9= equation:


Simplifying
15a + -9a + 7 + -4a + 5b + -9 = 0

Reorder the terms:
7 + -9 + 15a + -9a + -4a + 5b = 0

Combine like terms: 7 + -9 = -2
-2 + 15a + -9a + -4a + 5b = 0

Combine like terms: 15a + -9a = 6a
-2 + 6a + -4a + 5b = 0

Combine like terms: 6a + -4a = 2a
-2 + 2a + 5b = 0

Solving
-2 + 2a + 5b = 0

Solving for variable 'a'.

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

Add '2' to each side of the equation.
-2 + 2a + 2 + 5b = 0 + 2

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

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

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

Add '-5b' to each side of the equation.
2a + 5b + -5b = 2 + -5b

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

Divide each side by '2'.
a = 1 + -2.5b

Simplifying
a = 1 + -2.5b

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