a/ 1/3x = 19/3 => x = 19
b/ 2/3x = 3/2 => x = 9/4
c/ -3/4x - x = -8 => -7/4x = -8 => x = 32/7
a) \(\frac{1}{3}.x-\frac{4}{3}=5\)
\(\frac{1}{3}.x=5+\frac{4}{3}\)
\(\frac{1}{3}.x=\frac{19}{3}\)
\(x=\frac{19}{3}:\frac{1}{3}\)
\(x=19\)
b) \(\frac{2}{3}x+\frac{1}{2}=2\)
\(\frac{2}{3}x=2-\frac{1}{2}\)
\(\frac{2}{3}x=\frac{3}{2}\)
\(x=\frac{3}{2}:\frac{2}{3}\)
\(x=\frac{9}{4}\)
c) \(3-\frac{3}{4}x=x-5\)
\(\frac{3}{4}x=3-\left(x-5\right)\)
\(\frac{3}{4}x=3-x+5\)
\(\frac{3}{4}x=8-x\)
\(\frac{3}{4}x+x=8\)
\(x\left(\frac{3}{4}+1\right)=8\)
\(x.\frac{7}{4}=8\)
\(x=8:\frac{7}{4}\)
\(x=\frac{32}{7}\)
Nhấn đúng cho mình nha!!!!!! ^^
