7y=4y+21

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Solution for 7y=4y+21 equation: 


Simplifying
7y = 4y + 21

Reorder the terms:
7y = 21 + 4y

Solving
7y = 21 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
7y + -4y = 21 + 4y + -4y

Combine like terms: 7y + -4y = 3y
3y = 21 + 4y + -4y

Combine like terms: 4y + -4y = 0
3y = 21 + 0
3y = 21

Divide each side by '3'.
y = 7

Simplifying
y = 7

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