What is 64 (y7)7 2y3 mark branliest if right

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Icould really use some with this question.

The square root of 9x plus 7 plus the square rot of 2x equall to 7