Question

\(a.\frac{4x-7}{12}-x=\frac{3x}{8}\\ b.\frac{5x-8}{3}=\frac{1-3x}{2}\\ c.\left(\frac{x-1}{\frac{2}{5}}-3\right)-\left(\frac{3x-2}{\frac{5}{4}}-2\right)=1\)

Answer 1

hai tk là 1 :vvv

Answer 2

ai quen thì kb cả 2 tk nhé

Answer 3

a) \(\frac{4x-7}{12}-x=\frac{3x}{8}\)

\(\Rightarrow\frac{4x-7-12x}{12}=\frac{3x}{8}\)

\(\Rightarrow\frac{-7-8x}{12}=\frac{3x}{8}\)

\(\Rightarrow-56-64x=36x\)

\(\Leftrightarrow100x=-56\Leftrightarrow x=\frac{-14}{25}\)

Answer 4

b) \(\frac{5x-8}{3}=\frac{1-3x}{2}\)

\(\Leftrightarrow10x-16=3-9x\)

\(\Leftrightarrow19x=19\Leftrightarrow x=1\)

Answer 5

c)

\(\left(\frac{x-1}{\frac{2}{5}}-3\right)-\left(\frac{3x-2}{\frac{5}{4}}-2\right)=1\)

\(\Rightarrow\left(\frac{5x-5}{2}-3\right)-\left(\frac{12x-8}{5}-2\right)=1\)

\(\Rightarrow\left(\frac{5x-5}{2}-\frac{12x-8}{5}\right)=2\)

\(\Rightarrow\frac{25x-25-24x+16}{10}=2\)

\(\Rightarrow\frac{x-9}{10}=2\Leftrightarrow x=29\)