3y-5+y+21=6y+20-4y

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Solution for 3y-5+y+21=6y+20-4y equation: 


Simplifying
3y + -5 + y + 21 = 6y + 20 + -4y

Reorder the terms:
-5 + 21 + 3y + y = 6y + 20 + -4y

Combine like terms: -5 + 21 = 16
16 + 3y + y = 6y + 20 + -4y

Combine like terms: 3y + y = 4y
16 + 4y = 6y + 20 + -4y

Reorder the terms:
16 + 4y = 20 + 6y + -4y

Combine like terms: 6y + -4y = 2y
16 + 4y = 20 + 2y

Solving
16 + 4y = 20 + 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
16 + 4y + -2y = 20 + 2y + -2y

Combine like terms: 4y + -2y = 2y
16 + 2y = 20 + 2y + -2y

Combine like terms: 2y + -2y = 0
16 + 2y = 20 + 0
16 + 2y = 20

Add '-16' to each side of the equation.
16 + -16 + 2y = 20 + -16

Combine like terms: 16 + -16 = 0
0 + 2y = 20 + -16
2y = 20 + -16

Combine like terms: 20 + -16 = 4
2y = 4

Divide each side by '2'.
y = 2

Simplifying
y = 2

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