Question

Tìm x biết:

(4,5-2x).1\(\frac{4}{7}=\frac{11}{4}\)

 

Answer 1

\(\left(4,5-2x\right).1\frac{4}{7}=\frac{11}{4}\)

\(\left(4,5-2x\right).\frac{11}{7}=\frac{11}{4}\)

\(4,5-2x=\frac{11}{4}:\frac{11}{7}=\frac{7}{4}\)

\(-2x=\frac{7}{4}-4,5=-\frac{11}{4}\)

Vì \(-2x=-\frac{11}{4}\)

\(\Rightarrow2x=\frac{11}{4}\)

\(x=\frac{11}{4}:2=\frac{11}{8}\)

Answer 2

(4,5-2x)=11/4:11/7.

=>4,5-2x=7/4.

=>2x=4,5-1,75=2,75.

=>x=2,75:2=1,375.

tk mk nha các bn.

-chúc ai tk cho mk học giỏi nha-