The cost of 4 pens and 8 pencils rupees is 84. If one pen costs rupees 12 more than the cost of one pencil, find the price of one pen and one pencil separately.
Answers
Answered by
2
Answer:
suppose the cost one pen is m rupees and cost of one pencil is n rupees.
therefore
4m + 8n = 84
by second condition
n = 12 + m
that is
m - n = -12
after solving this equations the value of m = 6 and value of n = 18
therefore the value of a pen will be 6 and that of the pencil will be 18.
plz like and Mark as brainlist...
Answered by
2
Answer:
Step-by-step explanation:
let the number of pen be x
let the number of pencils be y
4x+8y=84-(1)
x=12y
x-12y=0-(2)
from 1 and 2 equation(by elimitation method)
4x+8y=84
x-12y=0(×4)
4x+8y=84
4x-48y=0
56y=84
y=84/56
y=1.5
x-12 (1.5)=0
x-18=0
x=18
therefore cost of one pen=18
and cost of one pencil=1.5
Similar questions