81-109=-4(-4y)-9(2y)+y

Solution for 81-109=-4(-4y)-9(2y)+y equation:

Simplifying
81 + -109 = -4(-4y) + -9(2y) + y

Combine like terms: 81 + -109 = -28
-28 = -4(-4y) + -9(2y) + y

Remove parenthesis around (-4y)
-28 = -4 * -4y + -9(2y) + y

Multiply -4 * -4
-28 = 16y + -9(2y) + y

Remove parenthesis around (2y)
-28 = 16y + -9 * 2y + y

Multiply -9 * 2
-28 = 16y + -18y + y

Combine like terms: 16y + -18y = -2y
-28 = -2y + y

Combine like terms: -2y + y = -1y
-28 = -1y

Solving
-28 = -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
-28 + y = -1y + y

Combine like terms: -1y + y = 0
-28 + y = 0

Add '28' to each side of the equation.
-28 + 28 + y = 0 + 28

Combine like terms: -28 + 28 = 0
0 + y = 0 + 28
y = 0 + 28

Combine like terms: 0 + 28 = 28
y = 28

Simplifying
y = 28