\(\frac{1}{4}+x:4=\frac{3}{4}\)

\(\Leftrightarrow x:4=\frac{3}{4}-\frac{1}{4}\)

\(\Leftrightarrow x:4=\frac{2}{4}\left(=\frac{1}{2}\right)\)

\(\Leftrightarrow x:4=\frac{1}{2}\)

\(\Leftrightarrow x=\frac{1}{2}\cdot4\)

\(\Leftrightarrow x=2\)

Vậy x=2

\(\frac{1}{4}+x:4=\frac{3}{4}\)

\(x:4=\frac{3}{4}-\frac{1}{4}\)

\(x:4=\frac{2}{4}\)

\(x=\frac{2}{4}.4\)

\(x=2\)

Dấu "." là nhân

\(\frac{1}{4}+x\div4=\frac{3}{4}\)

\(\frac{1}{4}+\frac{x}{4}=\frac{3}{4}\)

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

Vậy \(x=2\)

a) \(\frac{3}{4}+\frac{1}{4}:x=-3\)

\(\frac{1}{4}:x=-3-\frac{3}{4}\)

\(\frac{1}{4}:x=\frac{-15}{4}\)

\(x=\frac{1}{4}:\frac{-15}{4}\)

\(x=\frac{-1}{15}\)

b) \(x-\frac{1}{2}=2,5-x\)

\(x+x=2,5+\frac{1}{2}\)

\(2x=3\)

\(x=\frac{3}{2}\)

c) \(\left(x+\frac{1}{10}\right)+\left(x+\frac{1}{11}\right)=0\)

\(2x+\frac{21}{110}=0\)

\(2x=\frac{-21}{110}\)

\(x=\frac{-21}{110}:2\)

\(x=\frac{-21}{220}\)

Vế phải bằng bao nhiêu vậy bạn?

kết quả của câu này đâu bạn

=>1/4+1/3:(2x-1)=-5

=>1/3:(2x-1)=-21/4

=>2x-1=-1/3:21/4=-1/3*4/21=-4/63

=>2x=59/63

=>x=59/126

\(\frac{1}{4}\)+x = \(\frac{3}{4}\)

<=> x = \(\frac{3}{4}\)-\(\frac{1}{4}\)

<=> x = \(\frac{1}{2}\)

Vậy x = \(\frac{1}{2}\)

Chúc bạn học tốt

\(\frac{1}{4}+x=\frac{3}{4}\)

\(x=\frac{3}{4}-\frac{1}{4}\)

\(x=\frac{2}{4}=\frac{1}{2}\)

Vậy \(x=\frac{1}{2}\)

\(\frac{1}{4}+x=\frac{3}{4}\)

\(\Rightarrow x=\frac{3}{4}-\frac{1}{4}\)

\(\Rightarrow x=\frac{2}{4}=\frac{1}{2}=0,5\)

#muon roi ma sao con 

\(\frac{x+1}{99}+\frac{x+2}{98}+\frac{x+3}{97}+\frac{x+4}{96}=-4\)

\(\Leftrightarrow\frac{x+100}{99}+\frac{x+100}{98}+\frac{x+100}{97}+\frac{x+100}{96}=0\)

\(\Leftrightarrow\left(x+100\right)\left(\frac{1}{99}+\frac{1}{98}+\frac{1}{97}+\frac{1}{96}\ne0\right)=0\Leftrightarrow x=-100\)

Vậy x = -100 

Ca này bó tay rồi, ghi rõ ra đc ko, khó hiểu quá

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