Răspuns:
[tex] \frac{7}{a} = \frac{b}{8} > > a = 8 \: \: \: \\ \: \: b = 7[/tex]
b×a= 8×7 = 56
[tex] \frac{42}{56} = \frac{6}{8} = \frac{3}{4} [/tex]
7/a=b/8 >>a=8 , b=7
b×a=8×7
b×a=56
42/58=6/8=2/4
