x+8-y use x=20 and y=17
Okay, so what they have given you is the values of X and y. So now we have to put the numbers into the given equation.X is 20 and y is 18.20+8-18First, 20+8=2828-18=10.So the answer is 10.Have a nice day
x+8-y20+8-17=28-17=11