18+3y=21

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Solution for 18+3y=21 equation: 


Simplifying
18 + 3y = 21

Solving
18 + 3y = 21

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 = 21 + -18

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

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

Divide each side by '3'.
y = 1

Simplifying
y = 1

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