-3y+3-21=0

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Solution for -3y+3-21=0 equation: 


Simplifying
-3y + 3 + -21 = 0

Reorder the terms:
3 + -21 + -3y = 0

Combine like terms: 3 + -21 = -18
-18 + -3y = 0

Solving
-18 + -3y = 0

Solving for variable 'y'.

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

Add '18' to each side of the equation.
-18 + 18 + -3y = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -3y = 0 + 18
-3y = 0 + 18

Combine like terms: 0 + 18 = 18
-3y = 18

Divide each side by '-3'.
y = -6

Simplifying
y = -6

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