# NCERT Solutions For Class 9 Maths Chapter 8 Linear Equations in Two Variables Ex 8.4

Here, Below you all know about NCERT Solutions for Class 9 Maths Chapter 8 Linear Equations in Two Variables Ex 8.4 Question Answer. I know many of you confuse about finding this Chapter 8 Linear Equations in Two Variables Ex 8.4 Of Class 9 NCERT Solutions. So, Read the full post below and get your solutions.

Textbook | NCERT |

Board | CBSE |

Category | NCERT Solutions |

Class | Class 9 |

Subject | Maths |

Chapter | Chapter 8 |

Exercise | Class 9 Chapter 8 Linear Equations in Two Variables Exercise 8.4 |

Number of Questions Solved | 2 |

## NCERT Solutions for Class 9 Maths Chapter 8 Linear Equations in Two Variables Ex 8.4

**NCERT TEXTBOOK EXERCISES**

**Question 1. Give the geometric representations of y = 3 as an equation**

**(i) in one variable.****(ii) in two variables.**

**Solution:**

The given linear equation is

y=3 â€¦(i)**(i)** The representation of the solution on the number line is shown in the figure below, where y = 3 is treated as an equation in one variable.

**(ii)** We know that, y = 3 can be written as

0 . x + y = 3

which is a linear equation in the variables x and y. This is represented by a line. Now, all the values of x are permissible because 0 . x is always 0.

However, y must satisfy the equation y = 3.

Note that, the graph AB is a line parallel to the x-axis and at a distance of 3 units to the upper side of it.

**Question 2. Give the geometric representations of 2x + 9 = 0 as an equation**

**(i) in one variable.****(ii) in two variables.**

**Solution:**

The given linear equation is

2x + 9=0

â‡’ x = â€“9/2 â€¦. ( i)**(i)** The representation of the solution on the number line is shown in the figure below, where x = â€“9/2 is treated as an equation in one variable.

**(ii)** We know that, 2x + 9= 0 can be written as

2x + 0y + 9 = 0

which is a linear equation in two variables x and y.

This is represented by a line.

Now, all the values of y are permissible because 0 .

y is always 0.

However, x must satisfy the equation 2x + 9 = 0.

Note that, the graph AB is a line parallel to the y-axis and at a distance of â€“ 9/2 = â€“ 4.5 to the left of it.

## NCERT Solutions for Class 9 Maths Chapter 8 Linear Equations in Two Variables Exercise 8.4 PDF

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