Question

What should be added to 5 to get 15/4​

Answer 1

Let the number be x

5+x=15/4

=》x=15/4-5

=》x=15/4-20/4

=》x=-5/4

Answer 2

5+x=15/4

(5+4x)*4=15

20+16x=15

16x=15-20

16x=-5

x=-5/16(ans)