Question

the cost of 3 pens and 2 pencils is rupees 110 represent this situation with a linear equation in two variables also find the cost of one pencil if one person one pen one pen cost rupees 20​

Answer 1

Answer:

let the no. of pens be x

and no.of copies be y

then the total cost of all the material bought is 110 rs

then the equation will be, 

3x+2y=110

it is the equation.

given 1 pen costs 20rs

so x=20

3(20)+2y=110

60+2y=110

2y=110-60

2y=50

y=50/2

y=25

therefore cost of 1 copy=rs 25

Explanation: