Răspuns:
a)
[tex] \frac{x}{5} = \frac{5}{x} \\ x \times x = 5 \times 5 \\ x {}^{2} = 25 \\ x = \sqrt{25} \\ x = 5[/tex]
b)
[tex] \frac{10}{x} = \frac{x}{3.6} \\ x \times x = 10 \times 3.6 \\ x {}^{2} = 36 \\ x = \sqrt{36} \\ x = 6[/tex]
d)
[tex] \frac{0.5}{x} = \frac{x}{2} \\ x \times x = 0.5 \times 2 \\ x {}^{2} = 1 \\ x = \sqrt{1} \\ x = 1[/tex]
c)
[tex] \frac{x}{0.75} = \frac{0.(3)}{x} \\ x \times x = 0.75 \times 0.(3) \\ x {}^{2} = 0.75 \times \frac{3}{9} \\ x {}^{2} = 0.75 \times \frac{1}{3} \\ x {}^{2} = \frac{0.75}{3} \\ x {}^{2} = 0.25 \\ x = \sqrt{0.25} \\ x = 0.5[/tex]
CE TREBUIE SA STIM PENTRU A PUTEA REZOLVA :
[tex] \huge \frac{a}{b} = \frac{c}{d} \\ \\ \huge{b \times c = a \times d}[/tex]
