Question

A teacher had 21 red pens. if the ratio of red pens to blue pens she owned was 3:1 how many pens did she have total?

Answer 1

29
i hope
i don't want u to get this wrong on a test or homework 
but as you see I'm trying
since i wasted my time on this website

Answer 2

28 because….
21/7= 3
7x1=7
so 21+7=28