A trader bought a number of articles for Rs 900. Five articles were found damaged. He sold each of the remaining articles at Rs 2 more than what he paid for it. He got a profit of Rs 80 on the whole transaction. Find the number of article he bought (Please solve using the linear equation in 2 variable way for 10th STD)
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he brought 45 articles five damaged then 40 multiply by 2 equal to 80
sandysanthose:
how do u know its 45
45 is not given...
We have to find it
Can't you solve it
Answered by
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Answer:
let the total no of aarticles be n
let the value of one article ne a
given:
na=900
a=900/n
(n-5)*(a+2)=980
na-5a+2n=990
900-5(900/n)+2n=990
2n-4500/n=90
n2-2250=45n
n2-45-2250=0
n(n-75)30(n-75)
(n+30) (n-75)
n=-30 n=75
sine the no of arrticles cannot be in negative
the answer is 75 explanation:
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