Răspuns:
9*(2x+1)=153
9*2x+ 9*1=153
18x+9=153
18x= 153-9
18x= 144
x= 144:18
x= 8
[tex]\it 9(2x+1)=153|_{:9} \Rightarrow 2x+1=17|_{-1} \Rightarrow 2x=16|_{:2} \Rightarrow x=8[/tex]
