120-2(80-y)=(120-2y)*.91

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Solution for 120-2(80-y)=(120-2y)*.91 equation:


Simplifying
120 + -2(80 + -1y) = (120 + -2y) * 0.91
120 + (80 * -2 + -1y * -2) = (120 + -2y) * 0.91
120 + (-160 + 2y) = (120 + -2y) * 0.91

Combine like terms: 120 + -160 = -40
-40 + 2y = (120 + -2y) * 0.91

Reorder the terms for easier multiplication:
-40 + 2y = 0.91(120 + -2y)
-40 + 2y = (120 * 0.91 + -2y * 0.91)
-40 + 2y = (109.2 + -1.82y)

Solving
-40 + 2y = 109.2 + -1.82y

Solving for variable 'y'.

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

Add '1.82y' to each side of the equation.
-40 + 2y + 1.82y = 109.2 + -1.82y + 1.82y

Combine like terms: 2y + 1.82y = 3.82y
-40 + 3.82y = 109.2 + -1.82y + 1.82y

Combine like terms: -1.82y + 1.82y = 0.00
-40 + 3.82y = 109.2 + 0.00
-40 + 3.82y = 109.2

Add '40' to each side of the equation.
-40 + 40 + 3.82y = 109.2 + 40

Combine like terms: -40 + 40 = 0
0 + 3.82y = 109.2 + 40
3.82y = 109.2 + 40

Combine like terms: 109.2 + 40 = 149.2
3.82y = 149.2

Divide each side by '3.82'.
y = 39.05759162

Simplifying
y = 39.05759162

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