Giúp mình nha, mình đang cần gấp. Cho mik cảm ơn trước nha
Có \(\frac{x}{-28}\)=\(\frac{42}{49}\)
<=> x.49=-28.42
<=> x.49=-1176
<=> x =-1176/49
<=>x =-24
\(\frac{x}{-28}=\frac{42}{49}\)
=> \(\frac{x}{-28}=\frac{6}{7}\)
=> \(\frac{x:\left(-4\right)}{-28:\left(-4\right)}=\frac{6}{7}\)
=> \(x:\left(-4\right)=6\)
=> \(x=-24\)
\(\frac{x}{-28}=\frac{42}{49}\)
\(\Leftrightarrow49x=\left(-28\right)\cdot42\)
\(\Leftrightarrow49x=-1176\)
\(\Leftrightarrow x=-24\)
\(\frac{x}{-28}\)\(=\frac{42}{49}\)
\(\Rightarrow\)\(x.49=42.-28\)
\(\Rightarrow\)\(x.49=-1176\)
\(\Rightarrow\)\(x=-24\)
Hok tốt !
\(\frac{x}{-28}=\frac{42}{49}\)
49x = -28 . 42
49x = -1176
x = -24
Học tốt