7+9a=15+a

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Solution for 7+9a=15+a equation:


Simplifying
7 + 9a = 15 + a

Solving
7 + 9a = 15 + 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.
7 + 9a + -1a = 15 + a + -1a

Combine like terms: 9a + -1a = 8a
7 + 8a = 15 + a + -1a

Combine like terms: a + -1a = 0
7 + 8a = 15 + 0
7 + 8a = 15

Add '-7' to each side of the equation.
7 + -7 + 8a = 15 + -7

Combine like terms: 7 + -7 = 0
0 + 8a = 15 + -7
8a = 15 + -7

Combine like terms: 15 + -7 = 8
8a = 8

Divide each side by '8'.
a = 1

Simplifying
a = 1

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