Question

What number should be subtracted from -5by3 to get 5by6?

Answer 1

Let the no be x
-5/3 - x =5/6
-5 - 3x/3 =5/6
By cross multiplication
-30 - 18x =15
-18x =15+30
-18x =45
x =45/-18
x = -5/2