If x is 12 units away from 20 it is either 20-12 or 20+12 so the two possibilities would be 8 or 32
Hope this helps!!
5000-97
= 4903
to check= 4903+97=5000
1/3 divide by 1/4
flip the 2nd number and the sign from division to multiplication
1/3 x 4/1
multiply
4/3