Explicație pas cu pas:
7
a)
[tex]\frac{2x + 3y}{7x - 4y} = \frac{2 \times 3 + 3 \times 2}{7 \times 3 + 4 \times 2} = \frac{6 + 6}{21 - 8} = \frac{12}{13} [/tex]
b)
[tex] \frac{7 x - 4y}{x + 2y} = \frac{7 \times 3 - 4 \times 2}{3 + 2 \times 2} = \frac{13}{7} [/tex]
c)
[tex] \frac{3x + 5y}{2x + 7y} = \frac{3 \times 3 + 5 \times 2}{2 \times 3 + 7 \times 2} = \frac{6 + 10}{6 + 14} = \frac{16}{20} [/tex]
