Question

2x - y = 4
x + 3y = 7
alguien q me ayude x favor con este ejercicio​

Answer 1

$y = - 4 + 2x \\ x + 3y = 7 \\ \\ x + 3( - 4 + 2x) = 7 \\ \\ x = \frac{19}{7} \\ \\ y = - 4 + 2 \times \frac{19}{7} \\ \\ y = \frac{10}{7} \\ \\ (x.y) = ( \frac{19}{7} . \frac{10}{7} ) \\ \\ 2 \times \frac{19}{7} - \frac{10}{7} = 4 \\ \frac{19}{7} + 3 \times \frac{10}{7} = 7 \\ \\ 4 = 4 \\ 7 = 7 \\ \\ = (x.y) = ( \frac{19}{7} . \frac{10}{7} )$