Question

Solve

Simi thinks of a no. and subtracts 3/7 from it. She multiples the result by 28. The result obtained is 25 times the same number he thought of. What is the number?

Answer 1

Let number is x

Now she subtract 3/7 from x

Let we get number as y after subtration

y = x-3/7

Now she multiply y with 28

result obtained is 25 times the original number

so 28y = 25x

put y = x-3/7

28*(x-3/7) = 25x

28x - 12 = 25x

28x-25x = 12

3x = 12

x = 4

Answer : 4