-7-3y=21

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Solution for -7-3y=21 equation: 


Simplifying
-7 + -3y = 21

Solving
-7 + -3y = 21

Solving for variable 'y'.

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

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

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

Combine like terms: 21 + 7 = 28
-3y = 28

Divide each side by '-3'.
y = -9.333333333

Simplifying
y = -9.333333333

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