9y-42=3y

Solution for 9y-42=3y equation:

Simplifying
9y + -42 = 3y

Reorder the terms:
-42 + 9y = 3y

Solving
-42 + 9y = 3y

Solving for variable 'y'.

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

Add '-3y' to each side of the equation.
-42 + 9y + -3y = 3y + -3y

Combine like terms: 9y + -3y = 6y
-42 + 6y = 3y + -3y

Combine like terms: 3y + -3y = 0
-42 + 6y = 0

Add '42' to each side of the equation.
-42 + 42 + 6y = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 6y = 0 + 42
6y = 0 + 42

Combine like terms: 0 + 42 = 42
6y = 42

Divide each side by '6'.
y = 7

Simplifying
y = 7