M-(4+(-M-3))=Y

Solution for M-(4+(-M-3))=Y equation:

Simplifying
M + -1(4 + (-1M + -3)) = Y

Reorder the terms:
M + -1(4 + (-3 + -1M)) = Y

Remove parenthesis around (-3 + -1M)
M + -1(4 + -3 + -1M) = Y

Combine like terms: 4 + -3 = 1
M + -1(1 + -1M) = Y
M + (1 * -1 + -1M * -1) = Y
M + (-1 + 1M) = Y

Reorder the terms:
-1 + M + 1M = Y

Combine like terms: M + 1M = 2M
-1 + 2M = Y

Solving
-1 + 2M = Y

Solving for variable 'M'.

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

Add '1' to each side of the equation.
-1 + 1 + 2M = 1 + Y

Combine like terms: -1 + 1 = 0
0 + 2M = 1 + Y
2M = 1 + Y

Divide each side by '2'.
M = 0.5 + 0.5Y

Simplifying
M = 0.5 + 0.5Y