Question

Write the information in mathematical symbols (Symbolic form)-Adding 3 to a certain number, yields 15.

Answer 1

let the no.= x
then
x+3=15

Answer 2

Hii ..... Here is ur answer....

Let the no. be x .
Then,

x + 3 = 15
x = 15 - 3
x = 12.

Hope this will help u.