Question

Luis colecta stamps. He has 4 more stamps from Egipto than from pero. He has 3 fewer stamps from Nigeria than from Egipto. He has 27 stamps from Nigeria. Hoy many stamps does he have from peru?

Answer 1

Step-by-step explanation:

Let's name:

`E:\text{Stamps from Egypt} \\ \\ P:\text{Stamps from Peru} \\ \\ N:\text{Stamps from Nigeria}`

1. He has 4 more stamps from Egipto than from Peru:

`E=P+4 \ \ \ \cdots eq1`

2. He has 3 fewer stamps from Nigeria than from Egipto.

`N=E-3 \ \ \ \cdots eq2`

3. He has 27 stamps from Nigeria:

`N=27 \ \ \ \cdots eq3`

Substituting eq3 into eq2:

`27=E-3 \\ \\ E=27+3 \\ \\ E=30`

Substituting E into eq1:

`30=P+4 \\ \\ P=30-4 \\ \\ P=26`

So he has:

• 30 stamps from Egypt
• 26 stamps from Peru
• 27 stamps from Nigeria