Question

решите  систему   линейных    уравнений
x-3y= -4
5x+2y= -3

Answer 1

$left { {{x-3y=-4} atop {5x+2y=-3}} right.$

$left { {{x=3y-4} atop {15y-20+2y=-3}} right.$ 

$left { {{x=3y-4} atop {17y=17}} right.$

$left { {{x=3y-4} atop {y=1}} right.$ 

$left { {{x=-1} atop {y=1}} right.$ 

Answer 2

5x-15y=-20

5x+2y=-3

-17y=-17

y=1

x=-4+3y=-1 x=-1