[tex]\rm 1. \\ \\ a\underbrace{|^{\underline{~~~~~}}||^{\underline{~~~~~}}|}|^{\underline{~~~~~}}|\underbrace{|^{\underline{~~~~~}}|} \\ ~~~~~~~~\frac12~~~~~~~~~~~~~~~~~ \frac14 \\ \\ Notezi~un~segment~cu~"x". \\ \\ 3x=390|:3 \\ \underline{x=130} \Longrightarrow \bold{a=4\cdot130=520}[/tex]
[tex]\rm 2. \\ \\ \underbrace{|^{\underline{~~~~~~a~~~~~}}||^{\underline{~~~~~~~b~~~~~~}}||^{\underline{~~~~~~~~~c~~~~~~~~}}|} \\~~~~~~~~~~~~~~~~~~~~~~~~6765 \\ \\ \underbrace{|^{\underline{~~~~~~a~~~~~}}||^{\underline{~~~~~~~b~~~~~~}}}}|^{\underline{~~~~~~~~~c~~~~~~~~}}| \\ ~~~~~~~~~~~~3553 \\ \\ {|^{\underline{~~~~~~a~~~~~}}|\underbrace{|^{\underline{~~~~~~~b~~~~~~}}||^{\underline{~~~~~~~~~c~~~~~~~~}}|}} \\ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~5533 \\ \\ \bold{c=6765-3553=3212} \\ \bold{a=6765-5533=1232} \\ \bold{b=5533-3212=2321}[/tex]
