m-(6+(m-9))=y

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

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

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

Remove parenthesis around (-9 + m)
m + -1(6 + -9 + m) = y

Combine like terms: 6 + -9 = -3
m + -1(-3 + m) = y
m + (-3 * -1 + m * -1) = y
m + (3 + -1m) = y

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

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

Solving
3 = y

Solving for variable 'y'.

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

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

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

Add '-3' to each side of the equation.
3 + -3 + -1y = 0 + -3

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

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

Divide each side by '-1'.
y = 3

Simplifying
y = 3