8a+6=3a+21

Solution for 8a+6=3a+21 equation:

Simplifying
8a + 6 = 3a + 21

Reorder the terms:
6 + 8a = 3a + 21

Reorder the terms:
6 + 8a = 21 + 3a

Solving
6 + 8a = 21 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
6 + 8a + -3a = 21 + 3a + -3a

Combine like terms: 8a + -3a = 5a
6 + 5a = 21 + 3a + -3a

Combine like terms: 3a + -3a = 0
6 + 5a = 21 + 0
6 + 5a = 21

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

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

Combine like terms: 21 + -6 = 15
5a = 15

Divide each side by '5'.
a = 3

Simplifying
a = 3