6+15a=4+13a

Solution for 6+15a=4+13a equation:

Simplifying
6 + 15a = 4 + 13a

Solving
6 + 15a = 4 + 13a

Solving for variable 'a'.

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

Add '-13a' to each side of the equation.
6 + 15a + -13a = 4 + 13a + -13a

Combine like terms: 15a + -13a = 2a
6 + 2a = 4 + 13a + -13a

Combine like terms: 13a + -13a = 0
6 + 2a = 4 + 0
6 + 2a = 4

Add '-6' to each side of the equation.
6 + -6 + 2a = 4 + -6

Combine like terms: 6 + -6 = 0
0 + 2a = 4 + -6
2a = 4 + -6

Combine like terms: 4 + -6 = -2
2a = -2

Divide each side by '2'.
a = -1

Simplifying
a = -1