\(\left(3x-25\right)-\left(x-9\right)=2-x\Leftrightarrow3x-25-x+9=2-x\Leftrightarrow2x-16-2+x=0\Leftrightarrow3x-18=0\)
\(\Leftrightarrow3x=18\Leftrightarrow x=6\)
\(2x+\left(-73-120\right)-\left(20-120\right)=5\Leftrightarrow2x-73-120-20+120=5\Leftrightarrow2x-93=5\)
\(\Leftrightarrow2x=98\Leftrightarrow x=49\)
๛๖ۣۜTɦủү❄๖ۣۜAɾĭαηηεツ Trình bày bài cho dễ nhìn nha -.-
\(\left(3x-25\right)-\left(x-9\right)=2-x\)
\(3x-25-x+9=2-x\)
\(\left(3x-x\right)-25+9=2-x\)
\(2x-16=2-x\)
\(2x+x=2+16\)
\(3x=18\)
\(x=6\)
\(2x+\left(-73-120\right)-\left(20-120\right)=5\)
\(2x+\left(-73\right)-120-20+120=5\)
\(2x+\left[\left(-73\right)-20\right]+\left(120-120\right)=5\)
\(2x+\left(-93\right)+0=5\)
\(2x+\left(-93\right)=5\)
\(2x=98\)
\(x=49\)
