A photo is printed on an 13-inch by 15-inch piece of paper. The photo covers 143 square inches and has a uniform border. What is the width of the border?

What does x = in this equation x+3+2x=x+5

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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?