NCERT solution [ Exercise 4.1] Lesson no .4 Linear Equation In Two Variables

Lesson .4.Linear Equation In Two Variables 

Extra information:

A linear  in two variable AX +BY +C= O, were A & B ≠ 0 is called linear equation in two variable.

It has infinitily many solutions

The equation of X- axis  is 

y =0 & Y-axis= X= 0 

The graph of x= a (ex ,3x) is a straight line parallel to Y- axis .

The graph of y= b (ex ,2y) is a straight line parallel to X- axis .

An equation of the type y= mx 

Represent a line passing through the origion (O).

Exercise 4.1 

Qué.1 ] The cost of a notebook is twice the cost of pen, write a linear equation in two variable to represent this statement.

Qué.2] Express the following linear equation in the form ax -by+ c=0 & incident the value of a,b &c in each case:

1] 2x 3y 9.35—

2]

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