Ex 3B Q31 to Q40 Class 10 Linear Equations in two Variables RS Aggarwal CBSE | New Syllabus

Book - RS Aggarwal
Book - NCERT
Class - 10
Chapter -Linear Equations in two Variables
exercise 3B
Q31 to Q40
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exercise 3B
Q41 to Q51

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ex 3b q31 ex 3b class10 rs aggrwal rs aggarwal class 10 chapter 10 ex 3b rs aggrwal ex 3b q40
An equation is said to be linear equation in two variables if it is written in the form of ax + by + c=0, where a, b & c are real numbers and the coefficients of x and y, i.e a and b respectively, are not equal to zero.
For example, 10x+4y = 3 and -x+5y = 2 are linear equations in two variables.
The solution for such an equation is a pair of values, one for x and one for y which further makes the two sides of an equation equal.
The solution of linear equations in two variables, ax+by = c, is a particular point in the graph, such that when x-coordinate is multiplied by a and y-coordinate is multiplied by b, then the sum of these two values will be equal to c.
Basically, for linear equation in two variables, there are infinitely many solutions.
Example
In order to find the solution of Linear equation in 2 variables, two equations should be known to us.
Consider for Example:
5x + 3y = 30
The above equation has two variables namely x and y.
Graphically this equation can be represented by substituting the variables to zero.

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[name....]

55:32 Sir Yaha pe Add hoga kyuki dono equation ka sign alag alag hai ek plus me hai aur ek minus me hai toh add krke answer lana easy ho jayega . [ ham substrate krke v answer la skte hai but add easy hoga ] Thanks ❤ [ 📌]

[Studystudio]

55:54 sir 40 no question pura nahi hai!

[voltzshorts]

Because we make two equations and justify through elmenation method when i see in question(+by)(-by) are coming in both equation.if we want to eliminate by subtracting so it is not wrong but further our equation get hard😮😅😅😅

[AmarjeetKumar-hot]

Kyuki plus plus nhi kat ta hai aur hme jab minus plus ko katna rhta hai to add krte hai aur plus plus ko to minus 😊😊

[Apekshasharma]

45:30 yaha pe 17-30 /5 krne pe -13/5 aana chahiye aapka 13/5 kaise or kyu aagya

[name....]

Thanks Sir Great Work ❤️❤️❤️

And please upload next video of questions 41 to 51 please❤️💫

[Mohitkumar-feim]

Sir I am your new suscriber watching your videos from 3 months and you can only who can explain like this❤ thank you so much sir🥰

[zaherakhan]

40 Wale qus may add isliye hua hai because sign are different so we are add both equation😊😊 but sir 40 qus solve nhi h pura

[DeepakSingh-zqzq]

Sir questions no 38 me 2u-15u=-13u hoga but aapne 13u hi likha phir bhi answer aagya

[Renuka]

I am your new subscriber from now..I have been watching your videos for 2 months..And these are really helpful for me😊

[wanderlust]

Sir linear equations ka graph work details mein dekhia

[AbhimanyuKumar-bfor]

Kyunki plus mines plus hota hai aur plus plus mines Hota Hai

[sarataibakakitchen]

Sir q no 35 me kya hum 1/x = a and 1/y = B let kar sakte hain kya

[shailijashreya]

Yah add isiliye Hua Hai Kyunki donon ka sign aalag...Hai