72=15y-3y

Solution for 72=15y-3y equation:

Simplifying
72 = 15y + -3y

Combine like terms: 15y + -3y = 12y
72 = 12y

Solving
72 = 12y

Solving for variable 'y'.

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

Add '-12y' to each side of the equation.
72 + -12y = 12y + -12y

Combine like terms: 12y + -12y = 0
72 + -12y = 0

Add '-72' to each side of the equation.
72 + -72 + -12y = 0 + -72

Combine like terms: 72 + -72 = 0
0 + -12y = 0 + -72
-12y = 0 + -72

Combine like terms: 0 + -72 = -72
-12y = -72

Divide each side by '-12'.
y = 6

Simplifying
y = 6