If we are supposed to assume that QS=TV
4v+3=7v-9
minus 4v both sides
3=3v-9
add 9
12=3v
divide 3
4=v
v=4
sub back
4v+3=QS=TV
4(4)+3=QS=TV
16+3=QS
19=QS=TV
then answer is C
1 UK fl oz = 28,413 ml
2 UK fl oz = 56,826 ml
If 5ml contains 160mg
56,826fl oz contains X mg
________________________
56,826 X 160 = 9,092,160
9,092,160 / 5 = 1818,432mg acetaminophen needed
The answer is 4/5
its very simple