[tex] {}^{3)} \frac{x}{5} = \frac{12}{15} \\ \\ \frac{3x}{15} = \frac{12}{15} \\ \\ x = 12 \div 3 \\ x = 4[/tex]
[tex] {}^{7)} \frac{3}{x} = \frac{21}{35} \\ \\ \frac{21}{7x} = \frac{21}{35} \\ \\ x = 35 \div7 \\ x = 5[/tex]
[tex] \frac{15}{60} = {}^{5)} \frac{x}{12} \\ \\ \frac{15}{60 } = \frac{5x}{60} \\ \\ x = 15 \div 5 \\ x = 3[/tex]
[tex] \frac{36}{18} = \frac{10}{x} \\ \\36 \div 18 = 10 \div x \\ 2 = 10 \div \:x \\ x = 10 \div 2 \\ x = 5 [/tex]
Sper că e-am ajutat!! :))
