8a+3=2a+21

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Solution for 8a+3=2a+21 equation:


Simplifying
8a + 3 = 2a + 21

Reorder the terms:
3 + 8a = 2a + 21

Reorder the terms:
3 + 8a = 21 + 2a

Solving
3 + 8a = 21 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
3 + 8a + -2a = 21 + 2a + -2a

Combine like terms: 8a + -2a = 6a
3 + 6a = 21 + 2a + -2a

Combine like terms: 2a + -2a = 0
3 + 6a = 21 + 0
3 + 6a = 21

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

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

Combine like terms: 21 + -3 = 18
6a = 18

Divide each side by '6'.
a = 3

Simplifying
a = 3

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