Question

mấy bn giúp mình gấp với nhé , gấp lắm í !!!!!! 2 tickkkkk ạ !!!!!!!!!!!!!!!!

Answer 1

1: \(x=\dfrac{-1}{2}+\dfrac{3}{4}=\dfrac{-2}{4}+\dfrac{3}{4}=\dfrac{1}{4}\)

2: x-1/5=2/11

nên \(x=\dfrac{2}{11}+\dfrac{1}{5}=\dfrac{10}{55}+\dfrac{11}{55}=\dfrac{21}{55}\)

3: \(x-\dfrac{5}{6}=\dfrac{16}{42}-\dfrac{8}{56}=\dfrac{5}{21}\)

nên \(x=\dfrac{5}{21}+\dfrac{5}{6}=\dfrac{10}{42}+\dfrac{35}{42}=\dfrac{45}{42}=\dfrac{15}{14}\)

4: \(\dfrac{x}{5}=\dfrac{5}{6}-\dfrac{19}{30}=\dfrac{25}{30}-\dfrac{19}{30}=\dfrac{6}{30}=\dfrac{1}{5}\)

nên x=1

9: x-7/8=13/12

nên \(x=\dfrac{13}{12}+\dfrac{7}{8}=\dfrac{26}{24}+\dfrac{21}{24}=\dfrac{47}{24}\)