2y-1=21

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Solution for 2y-1=21 equation: 


Simplifying
2y + -1 = 21

Reorder the terms:
-1 + 2y = 21

Solving
-1 + 2y = 21

Solving for variable 'y'.

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

Add '1' to each side of the equation.
-1 + 1 + 2y = 21 + 1

Combine like terms: -1 + 1 = 0
0 + 2y = 21 + 1
2y = 21 + 1

Combine like terms: 21 + 1 = 22
2y = 22

Divide each side by '2'.
y = 11

Simplifying
y = 11

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