You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard X

Mathematics

Method of Substitution to Find the Solution of a Pair of Linear Equations

The cost of p...

Question

The cost of pen is Rs 2x+3 .the cost of pencil is Rs y-3 .find the cost of 5 pens and 3 pencils together

Open in App

Solution

Cost of one pen = 2x+3
Cost of 5 pens = 5(2x+3) = 10x+15

Cost of one pencil = y-3
Cost of 3 pencils = 3(y-3) = 3y-9

∴ Total cost of 5 pens and 3 pencils = 10x+15 + 3y-9
= 10x + 3y + 15 -9
= 10x + 3y + 6

Hope you got the answer.

R

Suggest Corrections

Similar questions

5

pens and

6

pencils together cost

R s .37

and

3

pens and

3

pencils together cost

R s .21

. Find the cost of a pen and a pencil.

5

pens and 6 pencils together cost Rs.

9

and

3

pens and

2

pencils cost Rs.

5

. Find the cost of

1

pen and

1

pencil.

Q. 2 pencils and 3 pens together costs Rs.33 and 2 pens and 3 pencils together costs Rs. 27. What is the cost of one pencil and one pen?

$5$ pencils and $7$ pens together cost $R s . 50,$ whereas $7$ pencils and $5$ pens together cost $R s . 46.$ Find the costs of one pencil and one pen.

5

pencils and

7

pens together cost

R s 50

, whereas

7

pencils and

5

pens together cost

R s 46

. Find the cost of one pencil and that of one pen.

Join BYJU'S Learning Program

The cost of pen is Rs 2x+3 .the cost of pencil is Rs y-3 .find the cost of 5 pens and 3 pencils together

Cost of one pen = 2x+3 Cost of 5 pens = 5*(2x+3) = 10x+15 Cost of one pencil = y-3 Cost of 3 pencils = 3*(y-3) = 3y-9 ∴ Total cost of 5 pens and 3 pencils = 10x+15 + 3y-9 = 10x + 3y + 15 -9 = 10x + 3y + 6 Hope you got the answer. R

Cost of one pen = 2x+3
Cost of 5 pens = 5(2x+3) = 10x+15

Cost of one pencil = y-3
Cost of 3 pencils = 3(y-3) = 3y-9

∴ Total cost of 5 pens and 3 pencils = 10x+15 + 3y-9
= 10x + 3y + 15 -9
= 10x + 3y + 6

Hope you got the answer.

R