Math, asked by preetkanan2003, 1 year ago

3 bags and 4 pens together cost Rs257 whereas 4 bags and 3 pens together cost Rs324. Find the total cost of 1 bag and 10 pens.

Answers

Answered by Raghav243

let the cost of 1 pen be RS.y and cost of 1 bag be Rs. x
from this we get two equations
i.e. 3x+4y=257. eq.1
4x+3y=324. eq.2
using 1 we get x = 257-4y/3. eq.3
using 2 we get x=324-3y/4 eq.4
now compare equation 3 and 4 and u will get a value of x and then put that value of x in equation 1 and u will get value of y.
now cost of 1 bag =x
and cost of 10 pen =10y
hope it will help u
mark it as brainlist ....

preetkanan2003: How to mark an answer as brainliest

Raghav243: as nd when the 2 person will get done with his answer there will come a option above our answer it would be 'mark as brainlist' so u have to click that for the answer which helped u most

Answered by Anonymous286

LET THE COST OF BAG BE XRS
" " " PEN BE YRS
THEREFORE
3X+4Y=257
4X+3Y=324
ADDING BOTH EQUATION
7X+7Y=581-------->equation 3
SUBTRACTING EQUATION 1 AND 2
-X+Y=-67-------->equation 4
MULTIPLYING THROUGHOUT BY 7
-7X+7Y= -469-------> equation 5
adding EQ 3 and 5
14Y=112
Y=8 substitute in equation 4
X=75

HOPE it helps
MARK AS BRAINLIEST

Anonymous286: what's the answer

Raghav243: you should add eq 4 and 5

Raghav243: sry equation 3 and 5

Raghav243: u have calculation mistake

Anonymous286: yes

Anonymous286: even i thought

Anonymous286: thats why i asked him for the answer lol

Raghav243: and also there will be -350 instead of 350

Anonymous286: now its correct i think

Raghav243: yes

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