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If x=98 and y=3007 then y-x=?
6.
If x= 794 and y= - (x/2) then x - y=?
7.
If x=457, y=393 and z=8, then (x-y)/z=?
8.
If x=1764 and y=677 then y-x=?
9.
If x=673 and y=52, then (x-y)/3 = ?
10.
If x=372 and y=520, then (x+y)/4 = ?