6-(y+3)=-9

Solution for 6-(y+3)=-9 equation:

Simplifying
6 + -1(y + 3) = -9

Reorder the terms:
6 + -1(3 + y) = -9
6 + (3 * -1 + y * -1) = -9
6 + (-3 + -1y) = -9

Combine like terms: 6 + -3 = 3
3 + -1y = -9

Solving
3 + -1y = -9

Solving for variable 'y'.

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

Add '-3' to each side of the equation.
3 + -3 + -1y = -9 + -3

Combine like terms: 3 + -3 = 0
0 + -1y = -9 + -3
-1y = -9 + -3

Combine like terms: -9 + -3 = -12
-1y = -12

Divide each side by '-1'.
y = 12

Simplifying
y = 12