Скачать или смотреть Linear Equations in One Variable - Maths Class 8th - Ex 2.4 - Question 3 - Chapter 2 - NCERT - CBSE

Linear Equations in One Variable - Maths Class 8th - Ex 2.4 - Question 3 - Chapter 2 - NCERT - CBSE

Full exercise on Linear Equations in One Variable, fully solved. This is a video tutorial for 8th class NCERT CBSE students. For other educational stuff, subscribe and press bell icon.

Solving Equations having the Variable on both Sides An equation is the equality of the values of two expressions. In the equation 2x – 3 = 7, the two expressions are 2x – 3 and 7. In most examples that we have come across so far, the RHS is just a number. But this need not always be so; both sides could have expressions with variables. For example, the equation 2x – 3 = x + 2 has expressions with a variable on both sides; the expression on the LHS i (2x – 3) and the expression on the RHS is (x + 2).

Example 14:The digits of a two-digit number differ by 3. If the digits are interchanged, and the resulting number is added to the original number, we get 143. What can be the original number?
Example 15:Arjun is twice as old as Shriya. Five years ago his age was three times Shriya’s age. Find their present ages.

EXERCISE 2.3
Solve the following equations and check your results.
1. 3x = 2x + 18
2. 5t – 3 = 3t – 5
3. 5x + 9 = 5 + 3x
4. 4z + 3 = 6 + 2z
5. 2x – 1 = 14 – x
6. 8x + 4 = 3 (x – 1) + 7
7. x=4/5(x+10)
8. (2x/3)+1 = (7x/15)+3
9. 2y+(5/3) = (26/3)-y
10. 3m = 5 m –(8/5)

EXERCISE 2.4
1. Amina thinks of a number and subtracts 5/2 from it. She multiplies the result by 8. The result now obtained is 3 times the same number she thought of. What is the number?
2. 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?
3. Sum of the digits of a two-digit number is 9. When we interchange the digits, it is found that the resulting new number is greater than the original number by 27. What is the two-digit number?
4. One of the two digits of a two digit number is three times the other digit. If you interchange the digits of this two-digit number and add the resulting number to the original number, you get 88. What is the original number?
5. Shobo’s mother’s present age is six times Shobo’s present age. Shobo’s age five years from now will be one third of his mother’s present age. What are their present ages?
6. There is a narrow rectangular plot, reserved for a school, in Mahuli village. The length and breadth of the plot are in the ratio 11:4.At the rate Rs100 per metre it will cost the village panchayat Rs 75000 to fence the plot. What are the dimensions of the plot?
7. Hasan buys two kinds of cloth materials for school uniforms, shirt material that costs him Rs 50 per metre and trouser material that costs him Rs 90 per metre. For every 2 meters of the trouser material he buys 3 metres of the shirt material. He sells the materials at 12% and 10% profit respectively. His total sale is Rs 36,660. How much trouser material did he buy?
8. Half of a herd of deer are grazing in the field and three fourths of the remaining are playing nearby. The rest 9 are drinking water from the pond. Find the number of deer in the herd.
9. A grandfather is ten times older than his granddaughter. He is also 54 years older than her. Find their present ages.
10. Aman’s age is three times his son’s age. Ten years ago he was five times his son’s age. Find their present ages.

#Class8 #LinearEquationsinOneVariable #NCERT #NcertSolutions #solvedexercises #teaching #CBSE #maths #MathematicsClass8th #LinearEquations #samrules

Make sure to Subscribe and get the latest tutorials for your delight :)
http://www.youtube.com/subscription_c...

Make sure to check out our other Video Tutorials!

Also, check us out when we're posting other helpful videos all throughout the week to help you tell more and grow more using online video.