8y=5y-21

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Solution for 8y=5y-21 equation: 


Simplifying
8y = 5y + -21

Reorder the terms:
8y = -21 + 5y

Solving
8y = -21 + 5y

Solving for variable 'y'.

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

Add '-5y' to each side of the equation.
8y + -5y = -21 + 5y + -5y

Combine like terms: 8y + -5y = 3y
3y = -21 + 5y + -5y

Combine like terms: 5y + -5y = 0
3y = -21 + 0
3y = -21

Divide each side by '3'.
y = -7

Simplifying
y = -7

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