Question

Erykah has 6 less than 3 times the number of stamps in her collection that Chris has in his. Let r equal the number of stamps Chris has. Which expression represents the number of stamps Erykah has? (Let r = the number of stamps Chris has)

A. 6 - 3r
B. 3r + 6
C. 3r - 6
D. 6 + 3r

Answer 1

Option C is correct.

The expression represents the number of stamps Erykah has : 3r -6

Explanation:

Let r be the number of stamps Chris has.

as per the given condition: Erykah has 6 less than 3 times the number of stamps in her collection that Chris has in his.

"3 times the number of stamps Chris has" means 3r

"6 less than 3 times number of stamps Chris has" which means subtract 6 from 3r i,e 3r -6

therefore, the expression 3r -6 represents the number of stamps Erykah has.