120:y-23=17

To solve the equation 120:y-23=17, you need to isolate the variable y.

First, you can start by adding 23 to both sides of the equation to get rid of the constant term being subtracted from y:

120 + 23 = y - 17 143 = y - 17

Next, you can add 17 to both sides of the equation to isolate y:

143 + 17 = y - 17 + 17 160 = y

So, the solution to the equation is y = 160.