Răspuns:
[tex]8.\\\frac{2}{3} =\frac{35}{3} =>\frac{3a+2}{3} =\frac{35}{3} \\\\3(3a+2)=3*35=>9a+6=105=>9a=105-6=>a=11\\\\9.\frac{5a+3}{5} =\frac{53}{5} =>5(5a+3)=53*5=>25a+15=265=>a=250:25=>\\a=10\\\\10.\frac{7a+3}{7} =\frac{45}{7} =>7a+3=45=>7a=45-3=>a=42:7=>a=6[/tex]
