Question

2. A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new
numbers becomes twice the other new number. What are the numbers?​

Answer 1

Answer:

5x+21=2(x+21)

5x+21=2x+42

5x-2x=42-21

3x=21

x=21/3

x=7

Answer 2

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A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new numbers becomes twice the other new number. What are the numbers?

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Let above number be 'x'

$\leadsto \tt{2 \times x + 21 = 5x + 21}$

$\leadsto \tt{2 x + 42 = 5x + 21}$

$\leadsto \tt{2 x - 5x = 21 - 42}$

$\leadsto \tt{- 3x = 21 }$

$\leadsto \tt{ 3x = 21 }$

$\leadsto \tt{ x = \frac{21}{3} }$

$\leadsto \tt{ x = 7}$

So the two numbers are 7 and 35.

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