Răspuns :
[tex] \frac{x+1}{2} = \frac{5}{2} \\\\
x+1= \frac{5*2}{2} \\\\
x+1=5\\
x=5-1\\
x=4
[/tex]
x+1= \frac{5*2}{2} \\\\
x+1=5\\
x=5-1\\
x=4
[/tex]
[tex] \frac{x+1}{2}= \frac{5}{2}; \\ \\
2(x+1)=2*5; \\ \\
2x+2=10; \\ \\
2x=8; \\ \\
x=4;
[/tex]