9a-7a-8a=9-a

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Solution for 9a-7a-8a=9-a equation:


Simplifying
9a + -7a + -8a = 9 + -1a

Combine like terms: 9a + -7a = 2a
2a + -8a = 9 + -1a

Combine like terms: 2a + -8a = -6a
-6a = 9 + -1a

Solving
-6a = 9 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
-6a + a = 9 + -1a + a

Combine like terms: -6a + a = -5a
-5a = 9 + -1a + a

Combine like terms: -1a + a = 0
-5a = 9 + 0
-5a = 9

Divide each side by '-5'.
a = -1.8

Simplifying
a = -1.8

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