15+72=y

Solution for 15+72=y equation:

Simplifying
15 + 72 = y

Combine like terms: 15 + 72 = 87
87 = y

Solving
87 = y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
87 + -1y = y + -1y

Combine like terms: y + -1y = 0
87 + -1y = 0

Add '-87' to each side of the equation.
87 + -87 + -1y = 0 + -87

Combine like terms: 87 + -87 = 0
0 + -1y = 0 + -87
-1y = 0 + -87

Combine like terms: 0 + -87 = -87
-1y = -87

Divide each side by '-1'.
y = 87

Simplifying
y = 87