Question

a) 4x + y = 5
7x-y=8
X= y=​

Answer 1

Respuesta:

$4x + y = 5 \\ </p><p>7x-y=8 \\ y = 5 - 4x \\ 7x - (5 - 4x) = 8 \\ 7x - 5 + 4x = 8 \\ 11x - 5 = 8 \\ 11x = 8 + 5 \\ 11x = 13 \\ x = \frac{13}{11} \\ y = 5 - 4( \frac{13}{11} ) \\ y = 5 - \frac{52}{11} \\ y = \frac{(5 \times 11) - (52)}{11} \\ y = \frac{55 - 52}{11} \\ y = \frac{3}{11}$