A company charges $211.25 for 5 trees and 15 shrubs. The company charges  $15.25 more for a tree than a shrub. How much does each shrub cost? (8.EE.8c)  
a. $6.75  
b. $7.75  
c. $19.25  
d. $22.00
PLEASE HELP WHAT IS THE EQUATION AND THE STEPS AND THE ANSWER?