\(3x+\frac{1}{7}=x+\frac{2}{4}\)
\(3x-x=\frac{1}{2}-\frac{1}{7}\)
\(2x=\frac{5}{14}\)
\(x=\frac{5}{14}:2\)
\(x=\frac{5}{28}\)
Bn ơi phải là (3x+1)/7=(x+2)/4 nha
\(\frac{3x+1}{7}=\frac{x+2}{4}\)
\(\Rightarrow\left(3x+1\right).4=\left(x+2\right).7\)
\(\Rightarrow12x+4=7x+14\)
\(\Rightarrow12x-7x=14-4\)
\(\Rightarrow5x=10\)
\(x=10:5\)
\(x=2\)
chúc bạn học tốt