8a+7=9a

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Solution for 8a+7=9a equation:


Simplifying
8a + 7 = 9a

Reorder the terms:
7 + 8a = 9a

Solving
7 + 8a = 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.
7 + 8a + -9a = 9a + -9a

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

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

Add '-7' to each side of the equation.
7 + -7 + -1a = 0 + -7

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

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

Divide each side by '-1'.
a = 7

Simplifying
a = 7

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