3(100-y)+11y=100

Solution for 3(100-y)+11y=100 equation:

Simplifying
3(100 + -1y) + 11y = 100
(100 * 3 + -1y * 3) + 11y = 100
(300 + -3y) + 11y = 100

Combine like terms: -3y + 11y = 8y
300 + 8y = 100

Solving
300 + 8y = 100

Solving for variable 'y'.

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

Add '-300' to each side of the equation.
300 + -300 + 8y = 100 + -300

Combine like terms: 300 + -300 = 0
0 + 8y = 100 + -300
8y = 100 + -300

Combine like terms: 100 + -300 = -200
8y = -200

Divide each side by '8'.
y = -25

Simplifying
y = -25