1. EXERCISE 4.1 The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this

Question

1.
EXERCISE 4.1
The cost of a notebook is twice the cost of a pen. Write a linear equation in two
variables to represent this statement.
(Take the cost of a notebo​

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Amara 4 weeks 2021-10-29T19:10:55+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-10-29T19:12:09+00:00

    Step-by-step explanation:

    Let the cost of a notebook be Rs. x and that of a pen be Rs. y.

    Given the cost of a notebook is twice the cost of a pen.

    Then x=2y

    or, x−2y=0.

    This is the required linear equation in two variable.

    0
    2021-10-29T19:12:30+00:00

    Equation = x 2y = 0

    Step-by-step explanation:

    Given:

    • Cost of a notebook is twice the cost of a pen.

    To Write:

    • Linear equation in two variables.

    Solution: Let the cost of a pen be Rs y and cost of a notebook be Rs x. Therefore,

    ➱ Cost of a notebook = 2 times of cost of pen

    ➱ Cost of a notebook = 2 times of y

    ➱ x = 2y or

    ➱ x – 2y = 0 [ Transported to LHS from RHS ]

    Hence, x – 2y = 0 is the linear equation in two variable.

    ____________________

    ★ What is linear equation in two variable ?

    => An equation which in the form of ax + by + c = 0, where a , b , c are real numbers and a and b are not both zero ( a 0 , b 0 ) , then it is called a linear equation in two variable x and y.

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