3y-21+4=21

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Solution for 3y-21+4=21 equation:


Simplifying
3y + -21 + 4 = 21

Reorder the terms:
-21 + 4 + 3y = 21

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

Solving
-17 + 3y = 21

Solving for variable 'y'.

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

Add '17' to each side of the equation.
-17 + 17 + 3y = 21 + 17

Combine like terms: -17 + 17 = 0
0 + 3y = 21 + 17
3y = 21 + 17

Combine like terms: 21 + 17 = 38
3y = 38

Divide each side by '3'.
y = 12.66666667

Simplifying
y = 12.66666667

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