3a+4=13+a

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Solution for 3a+4=13+a equation:


Simplifying
3a + 4 = 13 + a

Reorder the terms:
4 + 3a = 13 + a

Solving
4 + 3a = 13 + 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 = 13 + a + -1a

Combine like terms: 3a + -1a = 2a
4 + 2a = 13 + a + -1a

Combine like terms: a + -1a = 0
4 + 2a = 13 + 0
4 + 2a = 13

Add '-4' to each side of the equation.
4 + -4 + 2a = 13 + -4

Combine like terms: 4 + -4 = 0
0 + 2a = 13 + -4
2a = 13 + -4

Combine like terms: 13 + -4 = 9
2a = 9

Divide each side by '2'.
a = 4.5

Simplifying
a = 4.5

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