Brian has 3 more books than Erika. Jasmine has triple the number of books that Brian has. Altogether Brian, Erika and Jasmine have 22 books. How many books does Jasmine have?

Question

campbell_st · Answer

let erika have x books 

     brian has x + 3

     jasmine has 3(x +3)

so together then have 

x + x + 3 + 3(x + 3) = 22

solve for x

anonymous · Answer

let  no of book with Erica be x
then Brian will have x +3 book
and Jasmine will  have  3 (3+x)   { as it given "Jasmine has triple the number of books that Brian has "}

so now total no of book =
$$x+ (x+3) +{3 \times (x+3)}=22$$

anonymous · Answer

5x+12=22
5x=10 
x=2
no of book Erica  has is 2