Question

the cost of a notebook is rs.5 less than the twice of the cost of a pen.Write the linear equation of the above information.

Answer 1

Step-by-step explanation:

let the cost of the pen = x

then cost of notebook = 2x-5

Answer 2

a - 2b + 5 = 0

Given: The cost of a notebook is Rs 5 less than twice the cost of a pen.

To Find: The linear equation

Solution: Let, the cost of a notebook be a.

Let, the cost of a pen be b.

Now, from the information given in the question we know that:

To find the cost of the notebook, we need to multiply the cost of a pen by 2 and decrease it by 5

Twice the cost of a pen = 2 × b = 2b

5 less than twice the cost of a pen = 2b - 5

Therefore, the cost of a notebook = 2b - 5

Since the cost of a notebook = a

So, the required linear equation will be as follows:

a = 2b - 5

Sending RHS to LHS:

a - 2b + 5 = 0

Hence, this is the required linear equation.

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