Răspuns:
[tex]x=\frac{1}{5}[/tex]
Explicație pas cu pas:
[tex]\frac{1}{2} = x+\frac{3}{10}\\ \frac{1}{2}-x= \frac{3}{10}\\-x=\frac{3}{10}-\frac{1}{2}\\-x=\frac{3}{10}-\frac{1}{2}*5\\ -x=\frac{3}{10}-\frac{5}{10}\\ -x=\frac{-2}{10} \\x=\frac{1}{5}[/tex]
Ai scris gresit enuntul, deci voi adauga si rezolvarea conform enuntului corect:
[tex]\frac{1}{2}=\frac{x+3}{10}\\2(x+3)=1*10\\2x+6=10\\2x=10-6\\2x=4\\x=\frac{4}{2}\\ x=2.[/tex]
