Question

các bạn giúp mình với(ghi cả cách giải nhé)

1/5+1/3 x (x+1)=1/4

Answer 1

\(\frac{1}{5}+\frac{1}{3}\left(x+1\right)=\frac{1}{4}\)

\(\frac{1}{3}\left(x+1\right)=\frac{1}{4}-\frac{1}{5}\)

\(\frac{1}{3}\left(x+1\right)=\frac{1}{20}\)

\(x+1=\frac{1}{20}:\frac{1}{3}\)

\(x+1=\frac{3}{20}\)

\(x=\frac{3}{20}-1\)

\(x=-\frac{17}{20}\)

Answer 2

\(\frac{1}{5}+\frac{1}{3}\left(x+1\right)=\frac{1}{4}\)

\(\frac{1}{3}\left(x+1\right)=\frac{1}{4}-\frac{1}{5}\)

\(\frac{1}{3}\left(x+1\right)=\frac{1}{20}\)

\(x+1=\frac{1}{20}:\frac{1}{3}\)

\(x-1=\frac{3}{20}\)

\(x=\frac{3}{20}-1\)

\(x=-\frac{17}{20}\)