3y+21=11

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Solution for 3y+21=11 equation: 


Simplifying
3y + 21 = 11

Reorder the terms:
21 + 3y = 11

Solving
21 + 3y = 11

Solving for variable 'y'.

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

Add '-21' to each side of the equation.
21 + -21 + 3y = 11 + -21

Combine like terms: 21 + -21 = 0
0 + 3y = 11 + -21
3y = 11 + -21

Combine like terms: 11 + -21 = -10
3y = -10

Divide each side by '3'.
y = -3.333333333

Simplifying
y = -3.333333333

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