Question

2.(x-5)+10=20

(3x+1)-17=5

(10.x+120)-138=262

4.(x+1)-12=8

2x+2và1phần3=1phần2:3phần2

GIÚP MÌNH NHA CÁC PN CAMON NHIỀU

Answer 1

\(2\left(x-5\right)+10=20\)

\(\Leftrightarrow2\left(x-5\right)=10\)

\(\Leftrightarrow x-5=5\)

\(\Leftrightarrow x=10\)

   

\(\left(3x+1\right)-17=5\)

\(\Leftrightarrow3x+1=22\)

\(\Leftrightarrow3x=21\)

\(\Leftrightarrow x=7\)

   

\(\left(10x+120\right)-138=262\)

\(\Leftrightarrow10x+120=400\)

\(\Leftrightarrow10x=280\)

\(\Leftrightarrow x=28\)

   

\(4\left(x+1\right)-12=8\)

\(\Leftrightarrow4\left(x+1\right)=20\)

\(\Leftrightarrow x+1=5\)

\(\Leftrightarrow x=4\)

      

\(2x+2\frac{1}{3}=\frac{1}{2}:\frac{3}{2}\)

\(\Leftrightarrow2x+\frac{7}{3}=\frac{1}{3}\)

\(\Leftrightarrow2x=-2\)

\(\Leftrightarrow x=-1\)