Question 95921
55X+50(3.5-X)=185
55X+175-50X=185
5X=185-175
5X=10
X=10/5
X=2 HOURS SHE DROVE @ 55 MPH.
3.5-2=1.5 HOURS SHE DROVE @ 50MPH.
PROOF
55*2+50*1.5=185
110+75=185
185=185