Question

Mọi người giúp e nhé . E cảm ơn nhiều ạ.

Answer 1

a: =>x=75:25%=300

b: =>11/12x=-7/12

hay x=-7/11

c: \(\Leftrightarrow\left(x-1\right)\cdot\dfrac{1}{4}=\dfrac{1}{2}-\dfrac{3}{4}=\dfrac{-1}{4}\)

=>x-1=-1

hay x=0

Answer 2

\(a,=0,25.x=75\Rightarrow x=75:0,25=300\)

\(b,\dfrac{11}{12}x=\dfrac{1}{6}-\dfrac{3}{4}=\dfrac{-7}{12}\)

\(x=\dfrac{-7}{12}:\dfrac{11}{12}=\dfrac{-7}{11}\)

\(c,\dfrac{1}{4}\left(x-1\right)=\dfrac{1}{2}-\dfrac{3}{4}=\dfrac{-1}{4}\)

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

\(\Leftrightarrow x=0\)

Answer 3

a)=>\(\dfrac{1}{4}.x=75\)

=>x=300

b)\(\dfrac{11}{12}x+\dfrac{3}{4}=\dfrac{1}{6}\)

<=>\(\dfrac{11}{12}x=\dfrac{-7}{12}\)

=>x=\(\dfrac{-7}{11}\)

c)\(\dfrac{3}{4}+\dfrac{1}{4}\left(x-1\right)=\dfrac{1}{2}\)

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

<=>\(\dfrac{x}{4}=0\)

=>x=0