2(28-y)+4y=80

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Solution for 2(28-y)+4y=80 equation:


Simplifying
2(28 + -1y) + 4y = 80
(28 * 2 + -1y * 2) + 4y = 80
(56 + -2y) + 4y = 80

Combine like terms: -2y + 4y = 2y
56 + 2y = 80

Solving
56 + 2y = 80

Solving for variable 'y'.

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

Add '-56' to each side of the equation.
56 + -56 + 2y = 80 + -56

Combine like terms: 56 + -56 = 0
0 + 2y = 80 + -56
2y = 80 + -56

Combine like terms: 80 + -56 = 24
2y = 24

Divide each side by '2'.
y = 12

Simplifying
y = 12

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