Explicație pas cu pas:
[tex] \frac{x + 3}{6} = \frac{5}{2} \\ 2 \times (x + 3) = 30 \\ x + 3 = 15 \\ x = 12 \\ \\ \frac{27}{ 42} = \frac{45}{7x} \\ 45 \times 42 = 27 \times 7x \\ x = \frac{45 \times 42}{7 \times 27} \\ x = \frac{1890}{189} \\ x = 10[/tex]
