3-(4+(2m-1))=y

Solution for 3-(4+(2m-1))=y equation:

Simplifying
3 + -1(4 + (2m + -1)) = y

Reorder the terms:
3 + -1(4 + (-1 + 2m)) = y

Remove parenthesis around (-1 + 2m)
3 + -1(4 + -1 + 2m) = y

Combine like terms: 4 + -1 = 3
3 + -1(3 + 2m) = y
3 + (3 * -1 + 2m * -1) = y
3 + (-3 + -2m) = y

Combine like terms: 3 + -3 = 0
0 + -2m = y
-2m = y

Solving
-2m = y

Solving for variable 'm'.

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

Divide each side by '-2'.
m = -0.5y

Simplifying
m = -0.5y