4(5-y)=80

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Solution for 4(5-y)=80 equation: 


Simplifying
4(5 + -1y) = 80
(5 * 4 + -1y * 4) = 80
(20 + -4y) = 80

Solving
20 + -4y = 80

Solving for variable 'y'.

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

Add '-20' to each side of the equation.
20 + -20 + -4y = 80 + -20

Combine like terms: 20 + -20 = 0
0 + -4y = 80 + -20
-4y = 80 + -20

Combine like terms: 80 + -20 = 60
-4y = 60

Divide each side by '-4'.
y = -15

Simplifying
y = -15

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