Question

2. A positive number is 5 times another number 18 21 is added to both the numbers, then one of the new
numbers becomes twice the other new number. What are the numbers?
3. If one side of a square is increased by 3 m and other side is reduced by 2 m a rectangle is formed whose area
is 4 m' more than the area of the original square. Find the side of the original square​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:



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Ncert solutions

Grade 8

Mathematics

Science



Chapters in NCERT Solutions - Mathematics , Class 8



Exercises in Linear Equations in One Variable



Question 2



Q2) 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?

Solution

Transcript

Solution:

Let another number be x.

Then positive number = 5x

According to the question, 5x+21=2\left(x+21\right)5x+21=2(x+21)

\Rightarrow5x+21=2x+42⇒5x+21=2x+42

\Rightarrow5x-2x=42-21⇒5x−2x=42−21

\Rightarrow3x=21⇒3x=21

\Rightarrow x=\frac{21}{3}=7⇒x=321=7

Hence another number = 7 and positive number = 7 x 5 = 35.