If you can fill 1 van and 6 buses with 372 students, and fill 4 vans and 12 buses with 780 students, and each bus and van had the same number of students, how many students can 1 van hold? how many students can 1 bus hold?

A van can hold 18 students, and a bus can hold 59 students.
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Explanation:
Set up the following equations:




x represents the number of vans, and y represents the number of buses.

You want to multiply an equation by a number so that you can combine the two equations and eliminate a variable, which will let you solve for the other variable. This method is called substitution.

Multiply (1x + 6y = 372) by -2. Now you will have the following equations:




Combine the two equations to get the following:



Divide both sides by 2 to get x by itself.



A van can fit 18 students.

Since we now know the value of x, we can plug in this value into one of the equations and solve for y.

Take any equation. We'll use the same equation from before:



Plug in your x value.





Subtract 18 from both sides.



Divide both sides by 6 to get y by itself.



A bus can fit 59 students.