8a+21=6a+5

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Solution for 8a+21=6a+5 equation:


Simplifying
8a + 21 = 6a + 5

Reorder the terms:
21 + 8a = 6a + 5

Reorder the terms:
21 + 8a = 5 + 6a

Solving
21 + 8a = 5 + 6a

Solving for variable 'a'.

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

Add '-6a' to each side of the equation.
21 + 8a + -6a = 5 + 6a + -6a

Combine like terms: 8a + -6a = 2a
21 + 2a = 5 + 6a + -6a

Combine like terms: 6a + -6a = 0
21 + 2a = 5 + 0
21 + 2a = 5

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

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

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

Divide each side by '2'.
a = -8

Simplifying
a = -8

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