Question

tìm x biết: 0,(4)+1,2(31)-x=1,5(4)

Answer 1

Ta có : \(0,\left(4\right)+1,2\left(31\right)-x=1,5\left(4\right)\)

\(\Rightarrow\)\(\frac{4}{9}+1\frac{231-2}{990}-x=1\frac{54-5}{90}\)

\(\Rightarrow\)\(\frac{4}{9}+\frac{1219}{990}-x=\frac{139}{90}\)

\(\Rightarrow\)\(\frac{553}{330}-x=\frac{139}{90}\)

\(\Rightarrow\)\(x=\frac{553}{330}-\frac{139}{90}\)

\(\Rightarrow\)\(x=\frac{13}{99}\)

Vậy \(x=\frac{13}{99}\)

K MK Nha Lê Thị Thanh Phương