3=-(y+6)

Solution for 3=-(y+6) equation:

Simplifying
3 = -1(y + 6)

Reorder the terms:
3 = -1(6 + y)
3 = (6 * -1 + y * -1)
3 = (-6 + -1y)

Solving
3 = -6 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
3 + y = -6 + -1y + y

Combine like terms: -1y + y = 0
3 + y = -6 + 0
3 + y = -6

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

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

Combine like terms: -6 + -3 = -9
y = -9

Simplifying
y = -9