Question

1Tính

.\(\frac{18,4.0,3.7,5.4,8}{2,5.4,6.9,6.0,9}\)

2.Tĩm x,y,z

\(\frac{x}{13}=\frac{-15}{39}=\frac{20}{y}\)

b.\(\frac{-7}{x}=\frac{14}{16}=\frac{y}{32}\)

c.\(\frac{24}{x}=\frac{y}{32}=\frac{-6}{z}=\frac{3}{2}\)

d.\(\frac{-10}{15}=\frac{x}{-9}=\frac{-8}{y}=\frac{z}{-21}\)

3.Tìm x, biết:

\(\frac{x+1}{6}=\frac{8}{3}\)

Mong các bạn giúp  mình! 

Answer 1

\(\text{3 Giải}\)

\(\frac{x+1}{6}=\frac{8}{3}=\frac{16}{6}\Rightarrow x+1=16\Rightarrow x=15.\text{Vậy: x=15}\)