Question

A person bought 3 pens and 2 pencils together and paid Rs80/- Express this in the form of a linear equation​

Answer 1

Answer:

required linear equation in Two variables is 3 X + 2 Y = 80

Step-by-step explanation:

let cost of pen = X

cost of pencil = Y

A person bought 3 pens and 2 pencils together and paid Rs80/-

=> 3 X + 2 Y = 80

required linear equation in Two variables is 3 X + 2 Y = 80

Answer 2

A person bought 3 pens and 2 pencils ,          ( given)

Let consider cost of each pen  =A

∴ cost of 3 pens will be = 3×A

Now let consider cost of each pencil = B

∴ cost of 2 pencils = 2× B

According the question a person bought 3 pens and 2 pencils together and paid Rs80/-

that means :-

cost of 3 pens + cost of 2 pencils = Rs 80

∴ 3×A + 2×B = Rs 80

3 A + 2 B = Rs80

Hence the required linear equation in Two variables is 3 A + 2 B = Rs80

Ans :- Required linear equation in Two variables is 3 A + 2 B = Rs80

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