8th grade algebra
posted by cuca .
A train load of cars and trucks is en route to an automobile dealer for whom you work. Before they arrive, the dealer receives an invoice showing a total of 160 vehicles. Unfortunately, the part of the invoice showing how many of each kind of vehicles has been torn off and lost. The dealer need to know how many of each there will be before they arrive. Since you know algebra, you can save the day.
Set up an elimination equation. Solve for one variable. Finally plug in to equation 1 or 2 to get the other variable.