2y+21=8

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Solution for 2y+21=8 equation: 


Simplifying
2y + 21 = 8

Reorder the terms:
21 + 2y = 8

Solving
21 + 2y = 8

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 + 2y = 8 + -21

Combine like terms: 21 + -21 = 0
0 + 2y = 8 + -21
2y = 8 + -21

Combine like terms: 8 + -21 = -13
2y = -13

Divide each side by '2'.
y = -6.5

Simplifying
y = -6.5

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