Answer:
it should be A and if it is not a then b but I think A
10 - x = d (d= difference of 10 and x)
I think this right, sorry if it's wrong :/
2x/5+y=3
2x/5=3-y
2x=(3-y)•5
2x=5(3-y)
X=5(3-y)/2
The most it can be seated is 16 because of the value of 4 with 4 different odds 4*4 =16