(-6+(-y))-y=10

Solution for (-6+(-y))-y=10 equation:

Simplifying
(-6 + (-1y)) + -1y = 10

Remove parenthesis around (-6 + (-1y))
-6 + (-1y) + -1y = 10

Combine like terms: (-1y) + -1y = -2y
-6 + -2y = 10

Solving
-6 + -2y = 10

Solving for variable 'y'.

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

Add '6' to each side of the equation.
-6 + 6 + -2y = 10 + 6

Combine like terms: -6 + 6 = 0
0 + -2y = 10 + 6
-2y = 10 + 6

Combine like terms: 10 + 6 = 16
-2y = 16

Divide each side by '-2'.
y = -8

Simplifying
y = -8