Question

sistema de ecuaciones
4×+3y=31
y=2×+7​

Answer 1

$4x + 3y = 31 \\ 4x + 3y - 31 = 31 - 31 \\ 4x + 3y - 31 = 0$

$y = 2x + 7 \\ 0 = 2x + 7 \\ x= \ - \frac{7}{2}$