Question

what rational number should be added to 10 to get the sum of -5/20

Answer 1

Let the no be X
X+10 =-5/20
X = - 5/20 - 10
X = - 5 - 200/20
X =-205/20

Answer 2

let the number be x

then 10+x=-5/20

10+5/20=x

10×20/1×20 + 5/20=x

200/20 +5/20 =x

200+5/20=x

205/20=x

41/4=x

hope it helps