You need to add 17. x+-9=8 Add nine to each side x+-9=8 +9 +9 -9+9=0 so nine cancels out. 8+9=17 so now you have: x=17 Now you have the value of x.
9
You need to add 6 - (-9) = 6 + 9 = 15.
you need to add +9 +9-7 = +2
You need to add 18 to negative 8 to get 10.
you need to add 10
17
8+y is the sum of 8 and y
27
9
10 - (-9) = 19
It is: -9+16 = 7