How to solve word problem using d=rt?

Question

Jennifer left the hospital driving towards the desert two hours before Michaela. Michaela drove in the opposite direction at 35 mph slower for two hours. After, they were 350 miles apart. Find Jennifer’s speed.

Answer 1

Read and rearrange the information. Make a chart/diagram!

 

Michaela drove for 2 hours. Jennifer left 2 hours before so she drove for 4 hours.

Jennifer drove at r mph and Michaela drove at r - 35 mph.

 

4r + 2(r - 35) = 350

 

Can you solve for r and answer?