Respuesta :

iilovelysoto35

So we know nothing about blank so we can infer that’s our X in this case

So 4/5x=2/5 do inverse multiplication for 4/5 to get rid of it from the left side so you’re left with

X=5/4*2/5 just multiply across and you get 10/20 now simplify

1/2

altavistard

Answer:

1/2

Step-by-step explanation:

Better write, "If (4/5)x = 2/5, what is x?  Please do not use 'x' to denote multiplication; use " * " instead.

If (4/5)x = 2/5, multiplying both sides by (5/4) will isolate x:

(5/4)(4/5)x = (5/4)(2/5), or

               x = 10/20, or x = 1/2.  The unknown number is 1/2.