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21-11-2022
Mathematics

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Ava bought some markers for $2 each and some pencils for $1 each. She bought 3 more markers than pencils and spent a total of $12. How many pencils did ava buy?.

Respuesta :

21-11-2022

Answer:

6

Step-by-step explanation:

→ Set up 2 simultaneous equations

2x + y = 12

3 + x = y

→ Substitute 2nd equation into 1st

2x + 3 + x = 12

→ Simplify and solve

3x = 9 ⇔ x = 3

→ Substitute back

x = 3, y= 6

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