Add the product of 5 and 6 with the product of 3 and 7

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

Ihave trouble finding the nth term of a linear sequence

Icould really use some with this question.