Question

-5/8=x/16

 

Y/10=(-4)/8

Bai 8:

1) x/3-1/4=(-5)/6

2) x+3/15=1/3

3) x-12/4=1/2

4) 3/4x=1/2

Answer 1

BÀI 1 :
a) \(-\frac{5}{8}=\frac{x}{16}\)

\(\Rightarrow x=\frac{5.16}{-8}=\frac{80}{-8}=-10\)

b) \(\frac{y}{10}=-\frac{4}{8}\)

\(\Rightarrow y=\frac{-4.10}{8}=-\frac{40}{8}=-5\)

 

Answer 2

bài 8 

1) \(\frac{x}{3}-\frac{1}{4}=-\frac{5}{6}\)

\(\frac{x}{3}=-\frac{5}{6}+\frac{1}{4}\)

\(\frac{x}{3}=-\frac{7}{12}\)

\(\Rightarrow x=-\frac{7.3}{12}=-\frac{21}{12}=-\frac{7}{4}\)

2) \(x+\frac{3}{15}=\frac{1}{3}\)

\(x=\frac{1}{3}+\frac{3}{15}\)

\(x=\frac{8}{15}\)

3) \(x-\frac{12}{4}=\frac{1}{2}\)

\(x=\frac{1}{2}+\frac{12}{4}\)

\(x=\frac{7}{2}\)

4) \(\frac{3}{4}x=\frac{1}{2}\)

\(x=\frac{3}{4}:\frac{1}{2}\)

\(x=\frac{3}{2}\)