3y+21=7x

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Solution for 3y+21=7x equation: 


Simplifying
3y + 21 = 7x

Reorder the terms:
21 + 3y = 7x

Solving
21 + 3y = 7x

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 + 3y = -21 + 7x

Combine like terms: 21 + -21 = 0
0 + 3y = -21 + 7x
3y = -21 + 7x

Divide each side by '3'.
y = -7 + 2.333333333x

Simplifying
y = -7 + 2.333333333x

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