Question

A person bought 5 pencils and 7 pens together cost Rs.65. Express this in the form of a linear equation.​

Answer 1

Answer:

Step-by-step explanation:

5x+7y=65

Answer 2

Given :- A person bought 5 pencils and 7 pens together at cost ₹65.

To Find :- Express this in the form of linear equation ?

Answer :-

Let cost of 1 pencil is Rs.x and cost of 1 pen is Rs.y .

so,

→ cost of 1 pencil = x

→ cost or 5 pencils = x * 5 = Rs.5x

and,

→ cost of 1 pen = y

→ cost or 7 pens = y * 7 = Rs.7y

given that, total cost is Rs.65 .

therefore,

→ cost or 5 pencils + cost or 7 pens = 65

→ 5x + 7y = 65 = Required linear equation .

Hence, the linear equation of given expression is 5x + 7y = 65 .

Learn more :-

let a and b positive integers such that 90 less than a+b less than 99 and 0.9 less than a/b less than 0.91. Find ab/46

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