Question

giúp mình 2 câu n với ạ, mình đang cần gấp

Answer 1

\(-\dfrac{4}{5}+2x=\dfrac{1}{3}-\dfrac{2}{3}x\\ \Leftrightarrow-\dfrac{4}{5}+2x-\dfrac{1}{3}+\dfrac{2}{3}x=0\\ \Leftrightarrow-\dfrac{17}{15}+\dfrac{8}{3}x=0\\ \Leftrightarrow\dfrac{8}{3}x=\dfrac{17}{15}\\ \Leftrightarrow x=\dfrac{17}{40}\)

Answer 2

=>8/3x=1/3+4/5=5/15+12/15=17/15

=>x=17/15:8/3=17/15x3/8=51/120=17/40

Answer 3

c) \(\dfrac{2x-1}{3}=\dfrac{27}{2x-1}\)=>(2x-1)²=27.3=81

=>2x-1=9 hay 2x-1=-9

=>x=5 hay x=-4