21-3y=7x

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Solution for 21-3y=7x equation: 


Simplifying
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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