Question

Of two number, the first number is five times the second. when 21 is added to each number, the first number become two time the second number. find the number​

Answer 1

Given :

Of two number, the first number is five times the second. When 21 is added to each number, the first number becomes two time the second number.

To Find :

• What are the numbers?

Solution :

Let,

• The first number be 5x.
• The second number be x.

When 21 is added to each :

• First number = 5x + 21
• Second number = x + 21

According to the question,

⇝ 5x + 21 = 2(x + 21)

⇝ 5x + 21 = 2x + 42

⇝ 5x - 2x = 42 - 21

⇝ 3x = 21

⇝ x = 21/3

⇝ x = 7

✧ First number : ✧

⇢ 5x

⇢ 5(7)

⇢ 35

✧ Second number : ✧

⇢ x

⇢ 7

∴ The numbers are 35 and 7 respectively.