Question

X + X  x  1/4 : 2/7 +  X : 2/9 = 255

Giải nhanh giúp mk nha~~~~~~~~~~~~~~

Answer 1

\(x+x\times\frac{1}{4}:\frac{2}{7}+x:\frac{2}{9}=255\)

\(\Rightarrow x+x\times\frac{1}{4}\times\frac{7}{2}+x\times\frac{9}{2}=255\)

\(\Rightarrow x+x\times\frac{7}{8}+x\times\frac{9}{2}=255\)

\(\Rightarrow x\times\left(1+\frac{7}{8}+\frac{9}{2}\right)=255\)

\(\Rightarrow x\times\left(\frac{8}{8}+\frac{7}{8}+\frac{36}{8}\right)=255\)

\(\Rightarrow x\times\frac{51}{8}=255\)

\(\Rightarrow x=255:\frac{51}{8}\)

\(\Rightarrow x=40\)

Vậy \(x=40\)

~ Ủng hộ nhé 

Answer 2

Tìm  X  nha!

Answer 3

\(x+x\times\frac{1}{4}:\frac{2}{7}+x:\frac{2}{9}=255\)

\(x+x\times\frac{1}{4}\times\frac{7}{2}+x\times\frac{9}{2}=255\)

\(x\times\left(1+\frac{1}{4}\times\frac{7}{2}+\frac{9}{2}\right)=255\)

\(x\times\left(1+\frac{7}{8}+\frac{9}{2}\right)=255\)

\(x\times\frac{51}{8}=255\)

\(x=255:\frac{51}{8}=40\)

Vậy x = 40