Question

решить 7=4x-7 и y=-2x+11​

Answer 1

$7 = 4x - 7 \\ 4x = 7 \\ 4x = 14 \\ x = \frac{14}{4} = \frac{7}{2} \\ \\ y = - 2 \times \frac{7}{2} + 11 = - 7 + 11 = 4$