Can someone explain this to me, I don't understand it. Thank you!

It says factor each expression 49x-28?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?