4+(2-y)=20

Solution for 4+(2-y)=20 equation:

Simplifying
4 + (2 + -1y) = 20

Remove parenthesis around (2 + -1y)
4 + 2 + -1y = 20

Combine like terms: 4 + 2 = 6
6 + -1y = 20

Solving
6 + -1y = 20

Solving for variable 'y'.

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

Add '-6' to each side of the equation.
6 + -6 + -1y = 20 + -6

Combine like terms: 6 + -6 = 0
0 + -1y = 20 + -6
-1y = 20 + -6

Combine like terms: 20 + -6 = 14
-1y = 14

Divide each side by '-1'.
y = -14

Simplifying
y = -14