Question

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

Answer 1

Answer:

let x be the number

(x-15)*3=81

3x-45=81

3x=126

x=42

Answer 2

Answer:

THE ANSWER WILL BE X=42

Step-by-step explanation:

LET THE NUMBER BE X,

SO, ACCORDING TO QUESTION (ATQ)

=>( x - 15)*3 = 81

=>3x - 45 = 81

=>3x = 81 + 45

=>3x = 126

=>x= 126/3 = 42

PROVE-

( 42 - 15 )*3 = 81

27 * 3 = 81

81= 81

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