6-42=2a+a

Solution for 6-42=2a+a equation:

Simplifying
6 + -42 = 2a + a

Combine like terms: 6 + -42 = -36
-36 = 2a + a

Combine like terms: 2a + a = 3a
-36 = 3a

Solving
-36 = 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
-36 + -3a = 3a + -3a

Combine like terms: 3a + -3a = 0
-36 + -3a = 0

Add '36' to each side of the equation.
-36 + 36 + -3a = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -3a = 0 + 36
-3a = 0 + 36

Combine like terms: 0 + 36 = 36
-3a = 36

Divide each side by '-3'.
a = -12

Simplifying
a = -12