Question

x+3/7x21/9=5 

dấu gạch chéo là phân số  

Answer 1

\(x+\frac{3}{7}\times\frac{21}{9}=5\)

\(\Rightarrow x+\frac{3}{7}\times\frac{7}{3}=5\)

\(\Rightarrow x+1=5\)

\(\Rightarrow x=5-1=4\)

Answer 2

\(X+1=5\)

\(X=5-1\)

\(X=4\)

VẬY X=4 

K NHÁ BN

Answer 3

X+\(\frac{3}{7}\)x\(\frac{21}{9}\)=5

X+1=5

X=4

Vay X=.. 

lan sau viet p/s ban nhin o thanh cong cu co cai chu z lon nguoc day bam vao roi chon

Answer 4

\(x+\frac{3}{7}\times\frac{21}{9}=5\)

\(x+\frac{3}{7}\times\frac{7}{3}=5\)

\(x+1=5\)

\(\Rightarrow x=4\)