Question

a)450:[41-(2x+5)]=3^2.5

 

Answer 1

\(450:\left[41-\left(2x+5\right)\right]=3^2.5\)

\(\Leftrightarrow41-2x-5=12,5\)

\(\Leftrightarrow-2x=-23,5\)

\(\Leftrightarrow x=\dfrac{47}{4}\)

Answer 2

`450 : [41 - (2x+5)] = 3^2 .5`

`=> 450 : (41 - 2x-5) = 9.5`

`=> 450 : (36 - 2x) = 45`

`=> 36-2x= 450:45`

`=>36-2x=10`

`=> 2x= 26`

`=> x= 13`

Vậy `x= 13`