Question

The ratio of chairs to tables in an office is 9 : 7. If there are 42 more chairs than tables, find the number

of chairs in the office.

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Answer 1

Answer:

21

Step-by-step explanation:

9x = 7x + 42

9x - 7x = 42

2x = 42

x = 21

Answer 2

Answer:

The number of chairs in the office $=9 \times 21=189$

Step-by-step explanation:

Given,

The ratio of chairs to tables in an office is 9: 7.

If there are 42 more chairs than tables.

To Find  

The number of chairs in the office.

Let, number of chairs in office be 9x and the number of tables is 7x

According to the question,

9x-7x=42

⇒ 2x=42

⇒ x=21

Therefore, the number of chairs in the office $=9 \times 21=189$

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