4y=1y-21

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Solution for 4y=1y-21 equation: 


Simplifying
4y = 1y + -21

Reorder the terms:
4y = -21 + 1y

Solving
4y = -21 + 1y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
4y + -1y = -21 + 1y + -1y

Combine like terms: 4y + -1y = 3y
3y = -21 + 1y + -1y

Combine like terms: 1y + -1y = 0
3y = -21 + 0
3y = -21

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

Simplifying
y = -7

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