9a-9=a+7

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


Simplifying
9a + -9 = a + 7

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

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

Solving
-9 + 9a = 7 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-9 + 9a + -1a = 7 + a + -1a

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

Combine like terms: a + -1a = 0
-9 + 8a = 7 + 0
-9 + 8a = 7

Add '9' to each side of the equation.
-9 + 9 + 8a = 7 + 9

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

Combine like terms: 7 + 9 = 16
8a = 16

Divide each side by '8'.
a = 2

Simplifying
a = 2

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