Question

the positive number is 5 times another number .If 21 is added to both the numbers then one of the new number become twice The Other new number . what are the numbers​

Answer 1

Step-by-step explanation:

Let 1st number be x

So, other number=5x

if 21 added to both

1st number=x+21

2nd number=5x+21

ATQ

2(x+21)=5x+21

2x+42=5x+21

3x=21

x=7

Other number=7*5=35

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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