Răspuns :
[tex]a + b = 30 \\ a = b -4 \: \: ⇒b = a + 4[/tex]
a |--------|
b |--------| + 4
2 segmente + 4= 30
2 segmente= 30- 4
2 segmente=26
1 segment=26:2
1 segment=13 ⇒a=13
b=13+3
b=17
Răspuns: a=13
b=17
[tex]a + b = 30 \\ a = b -4 \: \: ⇒b = a + 4[/tex]
a |--------|
b |--------| + 4
2 segmente + 4= 30
2 segmente= 30- 4
2 segmente=26
1 segment=26:2
1 segment=13 ⇒a=13
b=13+3
b=17
Răspuns: a=13
b=17