99-7a=2a

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Solution for 99-7a=2a equation:


Simplifying
99 + -7a = 2a

Solving
99 + -7a = 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
99 + -7a + -2a = 2a + -2a

Combine like terms: -7a + -2a = -9a
99 + -9a = 2a + -2a

Combine like terms: 2a + -2a = 0
99 + -9a = 0

Add '-99' to each side of the equation.
99 + -99 + -9a = 0 + -99

Combine like terms: 99 + -99 = 0
0 + -9a = 0 + -99
-9a = 0 + -99

Combine like terms: 0 + -99 = -99
-9a = -99

Divide each side by '-9'.
a = 11

Simplifying
a = 11

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