Verified Answer :

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.

calculista

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 \(1\)


\(x=3y\)

equation \(2\)

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 \(21\)

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