Question

half a number is another number.their sum is 30

Answer 1

Let the numbers are x,y
and y=x/2
Then as given

X+x/2=30
3x/2=30
X=60/3
X=20
Y=10

Answer 2

The numbers are 10 and 20.

Given - Sum

Find - Number

Solution - Let the number be x. So, another number will be x/2.

Now question states that the sum of these two numbers will be 30.

Hence, representing this in equation form-

x + x/2 = 30

Now performing addition

Taking LCM between 1 and 2. LCM will be 2.

(x*2 + x)/2 = 30

(2x + x)/2 = 30

Performing addition on Left Hand Side

3x = 30*2

Performing multiplication on Right Hand Side

3x = 60

x = 60/3

Performing Division on Right Hand Side

x = 20

So, one number is 20.

Hence, another number = 20/2

Another number = 10

Hence, the two numbers are 10 and 20.

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