Question

Bài 1:

a, 7/8 - 1/4 . 5/2 = x/16

b, x - 1/3 = 2/5 . -6/7

 

 

 

Answer 1

 \(a,\Leftrightarrow\frac{1}{4}=\frac{x}{16}\Leftrightarrow x=4\)

\(b,\Leftrightarrow x=\frac{-1}{105}\)

Answer 2

\(\frac{7}{8}-\frac{1}{4}.\frac{5}{2}=\frac{x}{16}\)

\(\Rightarrow\frac{x}{16}=\frac{7}{8}-\frac{1}{4}.\frac{5}{2}\)

\(\Rightarrow\frac{x}{16}=\frac{7}{8}-\frac{5}{8}\)

\(\Rightarrow\frac{x}{16}=\frac{2}{8}\)

\(\Rightarrow\frac{x}{16}=\frac{1}{4}\)

\(\Rightarrow x=4\)

b) \(x-\frac{1}{3}=\frac{2}{5}.\frac{-6}{7}\)

\(\Rightarrow x-\frac{1}{3}=\frac{-12}{35}\)

\(\Rightarrow x=-\frac{1}{105}\)