\(\frac{11}{13}-\left(\frac{5}{42}-x\right)=-\left(\frac{15}{28}-\frac{11}{13}\right)\)
\(\left(\frac{5}{42}-x\right)=\frac{11}{13}-\left(-\frac{15}{28}-\frac{11}{13}\right)\)
\(\frac{5}{42}-x\)= \(\frac{11}{13}-\left(-\frac{503}{364}\right)\)
\(\frac{5}{42}-x\)= \(\frac{811}{364}\)
\(x=\frac{5}{42}-\frac{811}{364}\)
\(x=-\frac{329}{156}\)
Phần tìm x tự tính ra
\(\Leftrightarrow\frac{11}{13}-\frac{5}{42}+x=-\left(\frac{-113}{364}\right)\)
\(\Leftrightarrow\frac{11}{13}-\frac{5}{42}+x=\frac{113}{364}\)
\(\Leftrightarrow\frac{5}{42}+x=\frac{11}{13}-\frac{113}{364}\)
\(\Leftrightarrow\frac{5}{42}+x=\frac{15}{28}\)
\(\Leftrightarrow x=\frac{15}{28}-\frac{5}{42}\)
\(\Leftrightarrow x=\frac{5}{12}\)
Bài này tự quy đồng hoặc bấm máy nhé
11/13-(5/42-x)=-(15/28-11/13)
=>11/13-(5/42-x)=113/364
=>5/42-x=11/13-113/364
=>5/42-x=15/28
=> x=5/42-15/28
=>x=-5/12
vậy x=-5/12
tk mk nha
