Explicație pas cu pas:
a)
[tex] \frac{x}{8} = \frac{9}{4} \\ x = \frac{8 \times 9}{4} \implies\bf x = 18[/tex]
b)
[tex] \frac{12}{x} = \frac{5}{6} \\ x = \frac{12 \times 6}{5} \implies\bf x = \frac{72}{5} [/tex]
c)
[tex]\frac{25}{17} = \frac{8}{x} \\ x = \frac{17 \times 8}{25} \implies\bf x = \frac{136}{25} [/tex]
d)
[tex]\frac{12}{49} = \frac{x}{7} \\ x = \frac{12 \times 7}{49} \implies\bf x = \frac{12}{7} [/tex]
e)
[tex]\frac{7}{6} = \frac{21}{2x} \\ x = \frac{6 \times 21}{7 \times 2} \implies\bf x = 9[/tex]
f)
[tex] \frac{21}{5} = \frac{3x}{10} \\ x = \frac{21 \times 10}{5 \times 3} \implies \bf x = 14[/tex]
