Question 1156181
3HD+4H=10.00
4HD+3H=9.25
multiply top by 4 and bottom by -3
12HD+16H=40.00
-12HD-9H=-27.75. add them
7H=12.25
H=1.75
3HD+7=10.00
3HD=3
HD=1.00

check in bottom 
4+5.25=9.25. checks

so 1HD + 1H=1+1.75=$2.75