3y-1=18

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Solution for 3y-1=18 equation: 


Simplifying
3y + -1 = 18

Reorder the terms:
-1 + 3y = 18

Solving
-1 + 3y = 18

Solving for variable 'y'.

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

Add '1' to each side of the equation.
-1 + 1 + 3y = 18 + 1

Combine like terms: -1 + 1 = 0
0 + 3y = 18 + 1
3y = 18 + 1

Combine like terms: 18 + 1 = 19
3y = 19

Divide each side by '3'.
y = 6.333333333

Simplifying
y = 6.333333333

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