4-3y=21

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Solution for 4-3y=21 equation: 


Simplifying
4 + -3y = 21

Solving
4 + -3y = 21

Solving for variable 'y'.

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

Add '-4' to each side of the equation.
4 + -4 + -3y = 21 + -4

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

Combine like terms: 21 + -4 = 17
-3y = 17

Divide each side by '-3'.
y = -5.666666667

Simplifying
y = -5.666666667

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