Question

Barbara is planning a party . she invited some school friends and 2 times as many friends from her swimming club as school friends . if a total of 21 friends came to her party , how many school friends did she invite

Answer 1

Answer: 7 School Friends

Explanation:

Make a Variable

SWM = swimming club

SCH = school

if 21 people are at her party, then that means the ratio of SCH:SWM is 1:2

21/3 = 7

that means 7 school friends were invited

have a great day!

Answer 2

She invited 7 school friends