5+8a-5a=21+a

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Solution for 5+8a-5a=21+a equation:


Simplifying
5 + 8a + -5a = 21 + a

Combine like terms: 8a + -5a = 3a
5 + 3a = 21 + a

Solving
5 + 3a = 21 + 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.
5 + 3a + -1a = 21 + a + -1a

Combine like terms: 3a + -1a = 2a
5 + 2a = 21 + a + -1a

Combine like terms: a + -1a = 0
5 + 2a = 21 + 0
5 + 2a = 21

Add '-5' to each side of the equation.
5 + -5 + 2a = 21 + -5

Combine like terms: 5 + -5 = 0
0 + 2a = 21 + -5
2a = 21 + -5

Combine like terms: 21 + -5 = 16
2a = 16

Divide each side by '2'.
a = 8

Simplifying
a = 8

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