28=12+y+3y

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Solution for 28=12+y+3y equation:


Simplifying
28 = 12 + y + 3y

Combine like terms: y + 3y = 4y
28 = 12 + 4y

Solving
28 = 12 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
28 + -4y = 12 + 4y + -4y

Combine like terms: 4y + -4y = 0
28 + -4y = 12 + 0
28 + -4y = 12

Add '-28' to each side of the equation.
28 + -28 + -4y = 12 + -28

Combine like terms: 28 + -28 = 0
0 + -4y = 12 + -28
-4y = 12 + -28

Combine like terms: 12 + -28 = -16
-4y = -16

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

Simplifying
y = 4

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