Question

Rohan takes a number and subtract 5/2 from it. He multiples the result by 8. The result obtained is 3 times the given number. What is the number?
please give ans step by step explaination
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Answer 1

Answer:

the no. is 4

Step-by-step explanation:

$let \: the \: number \: be \: x \\ \\ as \: per \: the \: question \: \\ \\ = >( x - \frac{5}{2} ) \times 8 = 3x \\ = > 8x - 20 = 3x \\ = > 8x - 3x = 20 \\ = > 5x = 20 \\ = > x = 4$

Answer 2

Answer:

suppose the number is =X

He subtracted 5/2=X-5/2

Multiplies the result by 8=X-5/2×8

result obtained is 3 times original number=>X-5/2×8=3X

=>8X-20=3X

=>8X-3X=20

=>5X=20

=>X=4

Thus original number is 4