Question

find the number which when added to its half gives 42

Answer 1

Answer:

let the number be x

Explanation:

take x upon 1 and x upon 2

x/1 + x/2

take LCM of 1,2 =2 now add 2x +1x/2 gives 3x/2

3x=42x2

3x=84

x=84/3=28 ans

Answer 2

Concept

A proposition that is put into an argument and whose truth value is (temporarily) regarded as True is known as an assumption.

Given

the number which when added to its half gives 42

Find

We need to find the number

Solution

Let the number be x

So according to the statement

the number which when added to its half = x + (1/2)x

gives 42 = 42

Hence the equation formed is

x+x/2 = 42

∴ 2x + x = 84

∴ 3x = 84

∴ x = 28

Hence the number is 28

#SPJ2