1.

The price of a pen and pencil is 8 rupees. the price of 3 pen and pencil is 18 rupees. find the price of a pen and pencil​

Answer»

Answer:

the price of pen is ₹5 and pencil is ₹ 3

Step-by-step EXPLANATION:

LET the value of pen be x and pencil be y

now we are given that x+y=8

3x+y=18

if x+y=8

then, x=8-y

SUBSTITUTING the value of x above in

3x+y=18

we get 24-3y+y=18

therefore 24-18=2y by MOVING 18 on left and 2y on right

now 6=2y

thus y=6/2=3

y=3

substituting the value of y=3 in x+y=8

we get x+3=8

therefore x=8-3

therefore x=5



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