Question

i think of a number add 6 then multiple by 5 the answer is 120 what is number

Answer 1

let the no. be x

according to question
=(x+6)5=120
=5x+30=120
=5x=120-30
=5x=90
x=90/5
x=18

Answer 2

18+6=24
24×5=120
Hence the number that you assumed is 18