3a+4=a+20

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Solution for 3a+4=a+20 equation:


Simplifying
3a + 4 = a + 20

Reorder the terms:
4 + 3a = a + 20

Reorder the terms:
4 + 3a = 20 + a

Solving
4 + 3a = 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.
4 + 3a + -1a = 20 + a + -1a

Combine like terms: 3a + -1a = 2a
4 + 2a = 20 + a + -1a

Combine like terms: a + -1a = 0
4 + 2a = 20 + 0
4 + 2a = 20

Add '-4' to each side of the equation.
4 + -4 + 2a = 20 + -4

Combine like terms: 4 + -4 = 0
0 + 2a = 20 + -4
2a = 20 + -4

Combine like terms: 20 + -4 = 16
2a = 16

Divide each side by '2'.
a = 8

Simplifying
a = 8

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