\(\frac{x}{-28}=\frac{4}{7}\)
\(\Rightarrow7x=4.\left(-28\right)\)
\(\Rightarrow7x=-112\)
\(\Rightarrow x=\frac{-112}{7}\)
\(\Rightarrow x=-16\)
vậy \(x=-16\)
\(\frac{x}{\left(-28\right)}=\frac{4}{7}\) \(\Rightarrow\)\(_{_{ }^{ }x.7=4.\left(-28\right)\Rightarrow}\)7x=-112\(\Rightarrow\)x=\(\frac{-112}{7}\)\(\Rightarrow\)x=-16
Cách 1 :
Ta có :
\(\frac{x}{\left(-28\right)}=\frac{4}{7}\)
\(\Rightarrow4.28=7.x\)
\(\Rightarrow x=\frac{4.\left(-28\right)}{7}=-16\)
Cách 2 :
Ta có : \(\frac{4}{7}=\frac{16}{28}=\frac{\left(-16\right)}{\left(-28\right)}\)
Vậy \(x=-16\)
\(\frac{x}{-28}=\frac{7}{4}\)
\(-28.4=7.x\)
\(-112=7.x\)
\(x=\frac{-112}{7}=-16\)
Vậy x = - 16
