6=42+-1y-2y

Solution for 6=42+-1y-2y equation:

Simplifying
6 = 42 + -1y + -2y

Combine like terms: -1y + -2y = -3y
6 = 42 + -3y

Solving
6 = 42 + -3y

Solving for variable 'y'.

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

Add '3y' to each side of the equation.
6 + 3y = 42 + -3y + 3y

Combine like terms: -3y + 3y = 0
6 + 3y = 42 + 0
6 + 3y = 42

Add '-6' to each side of the equation.
6 + -6 + 3y = 42 + -6

Combine like terms: 6 + -6 = 0
0 + 3y = 42 + -6
3y = 42 + -6

Combine like terms: 42 + -6 = 36
3y = 36

Divide each side by '3'.
y = 12

Simplifying
y = 12