Question

A number is decreased by seven. Then, the new number is multiplied by 3 to get an answer of -9.

What is the original number?

Answer 1

let the number be x . so (x-7)3 = -9 ....
x-7=-3
x=4
so required no was 4

Answer 2

so 4 is the original number? @ankitshaw

Answer 3

yes obviously