Question

When 2 is added to a certain number, and the sum was doubled ,the result was 36 less than the original number multiplyed by 4. find the number​

Answer 1

number is 20

Explanation:

let n be the number then 2 added to it is n + 2 and doubling the sum gives 2(n + 2)

the result is 36 less than 4 times the number, that is 4n - 36

equating the 2 expressions

4n - 36 = 2(n + 2)

4n - 36 = 2n + 4 ( subtract 2n from both sides )

2n - 36 = 4 ( add 36 to both sides )

2n = 40 ( divide both sides by 2 )

n = 20

the original number is 20