3-3y-(y+1)=10

Solution for 3-3y-(y+1)=10 equation:

Simplifying
3 + -3y + -1(y + 1) = 10

Reorder the terms:
3 + -3y + -1(1 + y) = 10
3 + -3y + (1 * -1 + y * -1) = 10
3 + -3y + (-1 + -1y) = 10

Reorder the terms:
3 + -1 + -3y + -1y = 10

Combine like terms: 3 + -1 = 2
2 + -3y + -1y = 10

Combine like terms: -3y + -1y = -4y
2 + -4y = 10

Solving
2 + -4y = 10

Solving for variable 'y'.

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

Add '-2' to each side of the equation.
2 + -2 + -4y = 10 + -2

Combine like terms: 2 + -2 = 0
0 + -4y = 10 + -2
-4y = 10 + -2

Combine like terms: 10 + -2 = 8
-4y = 8

Divide each side by '-4'.
y = -2

Simplifying
y = -2