Question

Решите методом сложения
Х-3У=-3
5Х-2У=11

Answer 1

$left { {{x-3y=-3|*5} atop {5x-2y=11}} right. \ left { {{5x-15y=-15} atop {5x-2y=11}} right. \ -13y=-26\ y=-26:(-13)\ y=2$
$left { {{x-3y=-3|*2} atop {5x-2y=11|*3}} right. \ left { {{2x-6y=-6} atop {15x-6y=33}} right. \ -13x=-39\ x=-39:(-13)\ x=3$
Ответ: x=3, y=2.

Answer 2

x-3y=-3| *-5
5x-2y=11
-5x+15y=15
5x-2y=11
13y=26
y=26:13
y=2
x-3y=-3
x=3y-3
x=3*2-3
x=3