Question

x : 0,1 + x : 4 - x x 3/4 = 2,85

giúp với ạ !!!

Answer 1

\(x:0,1+x:4-x\times\dfrac{3}{4}=2,85\)

\(\Rightarrow x\times10+x\times\dfrac{1}{4}-x\times\dfrac{3}{4}=\dfrac{57}{20}\)

\(\Rightarrow x\times\left(10+\dfrac{1}{4}-\dfrac{3}{4}\right)=\dfrac{57}{20}\)

\(\Rightarrow x\times\dfrac{19}{2}=\dfrac{57}{20}\)

\(\Rightarrow x=\dfrac{57}{20}\times\dfrac{2}{19}\)

\(\Rightarrow x=\dfrac{114}{380}\)

\(\Rightarrow x=\dfrac{3}{10}\)

Answer 2

giải đầy đủ ra nhé ạ!!

Answer 3

x : 0,1 + x : 4 - x x 3/4 = 2,85

x.10+x.0,25-x.0,75=2,85

x.(10+0,25-0,75)=2,85

x.9,5=2,85

x=2,85:9,5

x=0,3

@Teoyewmay