100+0.5(y-100)=

Solution for 100+0.5(y-100)= equation:

Simplifying
100 + 0.5(y + -100) = 0

Reorder the terms:
100 + 0.5(-100 + y) = 0
100 + (-100 * 0.5 + y * 0.5) = 0
100 + (-50 + 0.5y) = 0

Combine like terms: 100 + -50 = 50
50 + 0.5y = 0

Solving
50 + 0.5y = 0

Solving for variable 'y'.

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

Add '-50' to each side of the equation.
50 + -50 + 0.5y = 0 + -50

Combine like terms: 50 + -50 = 0
0 + 0.5y = 0 + -50
0.5y = 0 + -50

Combine like terms: 0 + -50 = -50
0.5y = -50

Divide each side by '0.5'.
y = -100

Simplifying
y = -100