Find the value of x if, 20% of 75 = 225 - x% of 420.

Correct option is A

Given:

20% of 75 = 225 - x% of 420

Solution: 

Now,

​$$\frac{20}{100} \times 75 = \left(225 - \frac{x}{100} \times 420\right)$$​​

​$$15 = 225 - \frac{x}{100} \times 420$$​​

​$$\frac{x}{100} \times 420 = 225 - 15$$​​

​$$\frac{420x}{100} = 210$$​​

420x = 21000

x = $$\frac{21000}{420}$$​ = 50

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