Question

metodo de substituiçao {x+2y=1 {2x+3y=0

Answer 1

x+2y=1
2x+3y=O

x=1-2y
2(1-2y)+3y=0
2-4y+3y=0
-y=-2 (-1)
y=2


X+2(2)=1
x+4=1
x=1-4
x=-3

Answer 2

x=1-2y

substituindo: 2x+3y=0

                    2(1-2y)+3y=0

                    2-4y+3y=0

                   2-y=0

                     y=2

substituindo=  x+2y=1

                        x+2(2)=1

                        x+4=1

                        x=-3