Question

2.0 Q) A man's age 20 years hence would be thrice his age 20 years ago Find this present age? ​

Answer 1

Answer:

The present age of the man will be 40 years.

Step-by-step explanation:

• Let the present age of the man be "x"
• According to the question,

"A man's age 20 years hence would be thrice his age 20 years ago"

⇒   3 (x - 20) = (x + 20)

⇒   3x - 60 = x + 20

⇒   3x - x = 60 + 20

⇒    2x = 80

⇒      x = 40

Hence, the present age of the man will be forty years or 40 years.

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Answer 2

Concept:

First order equations include linear equations. In the coordinate system, the linear equations are defined for lines. A linear equation in one variable is one in which there is a homogeneous variable of degree 1 (i.e., only one variable). Multiple variables may be present in a linear equation. Linear equations in two variables, for example, are used when a linear equation contains two variables. Examples of linear equations include 2x - 3 = 0, 2y = 8, m + 1 = 0, x/2 = 3, and 3x - y + z = 3.

Given:

A man's age 20 years hence would be thrice his age 20 years ago

Find:

Find the present age of the man

Solution:

Let the present age of the man be "x"

According to the question

"A man's age 20 years hence would be thrice his age 20 years ago"

⇒   3 (x - 20) = (x + 20)

⇒   3x - 60 = x + 20

⇒   3x - x = 60 + 20

⇒    2x = 80

⇒      x = 40

Hence, the present age of the man will be forty years or 40 years.

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