Question

Решить графически систему уравнений 5x-2y=9 7x+2y=3

Answer 1

$left { {{5x-2y=9,} atop {7x+2y=3;}} right. left { {{y=2,5x-4,5,} atop {y=-3,5x+1,5;}} right. \ begin{array}{c|cc} x&0&3 \ y=2,5x-4,5&-4,5&3 \ end{array} begin{array}{c|cc} x&-1&0 \y=-3,5x+1,5&5&1,5 \ end{array} \ (1;-2).$