Step-by-step explanation:
the number is represented by x. you need to add -2 first then multiply by 5.
thus, the correct expression will be:
( x + -2) *5 = (x-2) *5 = 5(x-2)
for e.g, let x be 3.
acc to the puzzle,
3+-2 = 3-2=1
1*5= 5
using Kiran's expression:
x-10; 3-10= -7
here you can see the answer is wrong.
using the "correct expression" :
5(x-2) = 5( 3-2)
= 5(1)
= 5.
hope this helped you!
-s.
