12+5a=a+20

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Solution for 12+5a=a+20 equation:


Simplifying
12 + 5a = a + 20

Reorder the terms:
12 + 5a = 20 + a

Solving
12 + 5a = 20 + 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.
12 + 5a + -1a = 20 + a + -1a

Combine like terms: 5a + -1a = 4a
12 + 4a = 20 + a + -1a

Combine like terms: a + -1a = 0
12 + 4a = 20 + 0
12 + 4a = 20

Add '-12' to each side of the equation.
12 + -12 + 4a = 20 + -12

Combine like terms: 12 + -12 = 0
0 + 4a = 20 + -12
4a = 20 + -12

Combine like terms: 20 + -12 = 8
4a = 8

Divide each side by '4'.
a = 2

Simplifying
a = 2

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