Question

120/1,2x + 2/3 = 120/x

Tìm x

Answer 1

\(\frac{120}{1,2x}+\frac{2}{3}=\frac{120}{x}\Rightarrow\frac{100}{x}+\frac{2}{3}=\frac{120}{x}\)

\(\Rightarrow\frac{20}{x}=\frac{2}{3}\Rightarrow x=\frac{20.3}{2}=30\)

Answer 2

120/1.2x+2/3=120/x

100/x-120/x=-2/3

-20/x=-2/3

x=30

Answer 3

\(\frac{120}{1.2x}\)\(+\frac{2}{3}\)\(=\frac{120}{x}\)\(\Rightarrow\frac{100}{x}\)\(+\frac{2}{3}\)\(=\frac{120}{x}\)

\(\Rightarrow\frac{20}{x}\)\(=\frac{2}{3}\)\(\Rightarrow x=\frac{20.3}{2}\)\(=30\)

@Trungmh