9=-7a-2a

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Solution for 9=-7a-2a equation:


Simplifying
9 = -7a + -2a

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

Solving
9 = -9a

Solving for variable 'a'.

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

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

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

Add '-9' to each side of the equation.
9 + -9 + 9a = 0 + -9

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

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

Divide each side by '9'.
a = -1

Simplifying
a = -1

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