A student has a number of $40 dollar and $80 dollar savings bonds to use for part of her expenses for college. The total value of the bonds is $1000. There are 7 more $40 bonds than $80 bonds. How many of each type of bond does she have?

Question

A student has a number of $40 dollar and $80 dollar savings bonds to use for part of her expenses for college. The total value of the bonds is $1000.  There are 7 more $40 bonds than $80 bonds. How many of each type of bond does she have?

Steve · Answer

If there are x at $40 and y at $80, then 40x+80y = 1000 x = y+80 Now just solve for x and y