Răspuns :
[tex] \frac{12+3b}{18+2a} = \frac{6}{9}
[/tex]
12+3b=6
3b=6-12
3b=-6
b=-2
18+2a=9
2a=9-18
2a=-9
a= - [tex] \frac{9}{2} [/tex]
12+3b=6
3b=6-12
3b=-6
b=-2
18+2a=9
2a=9-18
2a=-9
a= - [tex] \frac{9}{2} [/tex]