Răspuns:
[tex]a) \frac{6}{x} \times 80 = 240 \\ \frac{6}{x} = \frac{240}{80} \\ \frac{6}{x} = 3 \\ x = 3 \times 6 \\ x = 18[/tex]
[tex]b) \frac{5}{x} \times 120 = 300 \\ \frac{5}{x} = \frac{300}{120 } \\ \frac{5}{x} = 2.5 \\ x = 2.5 \times 5 \\ x = 12.5[/tex]
[tex]c) \frac{7}{x} \times 40 = 140 \\ \frac{7}{x} = \frac{140}{40} \\ \frac{7}{x} = \frac{14}{4} \\ \frac{7}{x} = 3.5 \\ x = 3.5 \times 7 \\ x = 24.5[/tex]
[tex]d) \frac{8}{x} \times 60 = 120 \\ \frac{8}{x} = 120 \div 60 \\ \frac{8}{x} = 2 \\ x = 2 \times 8 \\ x = 16[/tex]
Sper că te-am ajutat! ^^
