Question

giúp mình bài này: 179-3.(2.x+1)=164

Answer 1

\(3\left(2x+1\right)=179-164=15\)

\(2x+1=\dfrac{15}{3}=5\)

\(2x=5-1=4\\ x=\dfrac{4}{2}=2\)

Answer 2

\(179-3\left(2x+1\right)=164.\)

\(\Leftrightarrow3\left(2x+1\right)=15.\Leftrightarrow2x+1=5.\Leftrightarrow x=2.\)