Question

A number is decreased by 15 and the new number and the new number so obtained is multiplied by 3..the result is 81 find the number​

Answer 1

Answer:

42

Step-by-step explanation:

Let the number be$"x"$

Given, it is decreased by 15

So number becomes $"x-15"$

Now if we multiply it by 3, it finally becomes 81.

Mathematically, we can put it as-

$3(x-15)=81$

$\implies 3x-45=81$

$\implies 3x=45+81$

$\implies x=126÷3$

$\implies x=42$

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Answer 2

answer is 42 explanation 3x =45. 126÷3=answer 42