a+81=9a-7

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Solution for a+81=9a-7 equation:


Simplifying
a + 81 = 9a + -7

Reorder the terms:
81 + a = 9a + -7

Reorder the terms:
81 + a = -7 + 9a

Solving
81 + a = -7 + 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.
81 + a + -9a = -7 + 9a + -9a

Combine like terms: a + -9a = -8a
81 + -8a = -7 + 9a + -9a

Combine like terms: 9a + -9a = 0
81 + -8a = -7 + 0
81 + -8a = -7

Add '-81' to each side of the equation.
81 + -81 + -8a = -7 + -81

Combine like terms: 81 + -81 = 0
0 + -8a = -7 + -81
-8a = -7 + -81

Combine like terms: -7 + -81 = -88
-8a = -88

Divide each side by '-8'.
a = 11

Simplifying
a = 11

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