3y-7z=21

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Solution for 3y-7z=21 equation: 


Simplifying
3y + -7z = 21

Solving
3y + -7z = 21

Solving for variable 'y'.

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

Add '7z' to each side of the equation.
3y + -7z + 7z = 21 + 7z

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

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

Simplifying
y = 7 + 2.333333333z

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