Question

2. The cost price of 60 articles is same as the selling price of x articles. If there is a profit of 20%, then what is the value of x?

Answer 1

20 = 60 -x /x × 100
x = 300 -5x
6x =300
x =50

Answer 2

Let C.P. of each article be Re. 1 C.P. of xarticles = Rs. x.
S.P. of x articles = Rs. 60
now
profite = sp - CP
= 60 -x

profit% =
$profit \times \frac{100}{cp} \\ \\ 20 = \frac{60 - x \times}{x} {100}{} \\ 6000 - 100x = 20x \\ 120x = 6000 \\ x = \frac{6000}{120} \\ x = 50 \: ans \\ \: \:$