42-12a=-15a+5

Solution for 42-12a=-15a+5 equation:

Simplifying
42 + -12a = -15a + 5

Reorder the terms:
42 + -12a = 5 + -15a

Solving
42 + -12a = 5 + -15a

Solving for variable 'a'.

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

Add '15a' to each side of the equation.
42 + -12a + 15a = 5 + -15a + 15a

Combine like terms: -12a + 15a = 3a
42 + 3a = 5 + -15a + 15a

Combine like terms: -15a + 15a = 0
42 + 3a = 5 + 0
42 + 3a = 5

Add '-42' to each side of the equation.
42 + -42 + 3a = 5 + -42

Combine like terms: 42 + -42 = 0
0 + 3a = 5 + -42
3a = 5 + -42

Combine like terms: 5 + -42 = -37
3a = -37

Divide each side by '3'.
a = -12.33333333

Simplifying
a = -12.33333333