Răspuns :
Răspuns:
[tex]3/a=b/21=4/12\\\\12b=21*4= > b=84:12= > b=7\\\\3/a=7/21= > 7a=21*3= > a=63:7= > a=9\\\\[/tex]
Răspuns:
[tex]\bf \red{a = 9}[/tex]
[tex]\bf \purple{ b= 7}[/tex]
Explicație pas cu pas:
[tex] \bf \dfrac{3}{a} = \dfrac{b}{21} = \dfrac{4}{12} \implies[/tex]
[tex] \bf \dfrac{3}{a} = \dfrac{4}{12} \implies a \cdot \: 4 = 3 \cdot12 \: \: \: \: \: \: \: \bigg|: 4\implies \red{ \underline{a = 9}}[/tex]
[tex]\bf \dfrac{b}{21} = \dfrac{4}{12} \implies b \cdot 12= 4 \cdot21 \: \: \: \: \: \: \: \: \bigg|: 12[/tex]
[tex]\bf b = 1 \cdot7 \implies \purple{ \underline{b= 7}}[/tex]
==pav38==
Baftă multă !