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Step-by-step explanation:
Given
SP = 210
profit percent (p%) = 5%
CP = X = ?
We know
Cost price (CP)
[tex] = \frac{sp \: \times 100}{100 + p\%} \\ = \frac{210 \times 100}{100 + 5} \\ = \frac{21000}{105} \\ = 200[/tex]
hope it helps :)❤
Or in another way
Let the cost price be x then
Profit amount
= 5 % of CP
= 5/100 * x
= x / 20
Selling Price (SP)
210 = CP + Profit amount
210 = x + x / 20
210 = ( 20x + x) / 20
210 * 20 = 21x
4200 = 21x
x = 4200 / 21
x = 200
Therefore CP = 200
Hope you understood.