8a+a-2=7a+9

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Solution for 8a+a-2=7a+9 equation:


Simplifying
8a + a + -2 = 7a + 9

Reorder the terms:
-2 + 8a + a = 7a + 9

Combine like terms: 8a + a = 9a
-2 + 9a = 7a + 9

Reorder the terms:
-2 + 9a = 9 + 7a

Solving
-2 + 9a = 9 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
-2 + 9a + -7a = 9 + 7a + -7a

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

Combine like terms: 7a + -7a = 0
-2 + 2a = 9 + 0
-2 + 2a = 9

Add '2' to each side of the equation.
-2 + 2 + 2a = 9 + 2

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

Combine like terms: 9 + 2 = 11
2a = 11

Divide each side by '2'.
a = 5.5

Simplifying
a = 5.5

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