Sari has 3 times as many pencil erasers as sam. together, they have 28 erasers. he may erasers does sari have

Question

asked Nov 1, 2015 98.9k views

2 Answers

HParker · Answer 1 · 2015-11-02T15:34:06+0000

Sari has 21 and Sam has 7 7x4=28 which is the total, so you just need to split it up so that you get 7 and 21 which is 3 times more than 7.

Hyponym · Answer 2 · 2015-11-07T05:59:30+0000

Let

x--------> the number of Saris pencil erasers

y--------> the number of Sams pencil erasers

we know that

$x+y=28\\ x=28-y$

equation

x=3y

equation

equate equation 1 and equation 2

so

$28-y=3y\\ 4y=28\\ y=7$

$x=3*7\\ x=21$

therefore

the answer is

the number of Saris pencil erasers is