Cảm ơn nha
`a+3/4+1/4:x=-2`
`<=>1/4:x=-2-3/4`
`<=>1/4:x=-11/4`
`<=>x=-11`
`b)2x-10/3=3/5`
`<=>2x=10/3+3/5`
`<=>2x=59/15`
`<=>x=589/30`
`c)(1/4-x)^2-125%=1 13/16`
`<=>(1/4-x)^2-5/4=29/16`
`<=>(1/4-x)^2=9/16=(+-3/4)^2`
`+)1/4-x=3/4`
`<=>x=-1/2`
`+)1/4-x=-3/4`
`<=>x=1`
a)\(\dfrac{3}{4}+\dfrac{1}{4}:x=-2\)
\(\dfrac{1}{4}:x=-2-\dfrac{3}{4}\)
\(\dfrac{1}{4}:x=\dfrac{-11}{4}\)
\(x=\dfrac{1}{4}:\dfrac{-11}{4}\)
\(x=\dfrac{-1}{11}\)
b) \(2x-\dfrac{10}{3}=\dfrac{3}{5}\)
\(2x=\dfrac{3}{5}+\dfrac{10}{3}\)
\(2x=\dfrac{59}{15}\)
\(x=\dfrac{59}{15}:2\)
\(x=\dfrac{59}{30}\)
c) \(\left(\dfrac{1}{4}-x\right)^2-125\%=1\dfrac{13}{16}\)
\(\left(\dfrac{1}{4}-x\right)^2=\dfrac{29}{16}+\dfrac{5}{4}\)
\(\left(\dfrac{1}{4}-x\right)^2=\dfrac{49}{16}\)
\(\Rightarrow\left(\dfrac{1}{4}-x\right)^2=\left(\dfrac{7}{4}\right)^2\) hoặc \(\left(\dfrac{1}{4}-x\right)^2=\left(\dfrac{-7}{4}\right)^2\)
\(\dfrac{1}{4}-x=\dfrac{7}{4}\) hoặc \(\dfrac{1}{4}-x=\dfrac{-7}{4}\)
\(x=\dfrac{-3}{2}\) hoặc \(x=2\)
giúp mik với mik cảm ơn trước nha :">
