Emily and Matt each improved their yards by planting grass sod and ornamental grass. They bought
their supplies from the same store. Emily spent $64 on 4 of grass sod and 4 bunches of ornamental
grass, Matt spent $82 on 7 of grass sod and 4 bunches of ornamental grass. What is the cost of one
of grass sod and the cost of one bunch of ornamental grass?
Explain?