Răspuns :
[tex]\frac{a}{4}=\frac{b}{5}=\frac{a+b}{4+5} =\frac{180}{9}=20; \\ \Rightarrow a=20\cdot 4=\boxed{80}; \\ \Rightarrow b=20 \cdot 5=\boxed{100};[/tex]
Răspuns:
a/4 = b/5 = k
a = 4k
b = 5k
4k + 5k = 180
9k = 180
k = 20
a = 80
b = 100
[tex]\frac{a}{4}=\frac{b}{5}=\frac{a+b}{4+5} =\frac{180}{9}=20; \\ \Rightarrow a=20\cdot 4=\boxed{80}; \\ \Rightarrow b=20 \cdot 5=\boxed{100};[/tex]
Răspuns:
a/4 = b/5 = k
a = 4k
b = 5k
4k + 5k = 180
9k = 180
k = 20
a = 80
b = 100