M-(M+3)=Y

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

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

Reorder the terms:
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