resolva os sistemas lineares?

1 ⤊

resolva os sistemas lineares?

x+y=2
2x+3y=3

2006-12-15 07:30:52 · 3 respostas · perguntado por xande.mgds 3 em Ciências e Matemática ➔ Matemática

3 respostas

x + y = 2
2x + 3y = 3

1)
x = 2 - y

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

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

Resposta: (3, - 1)

2006-12-15 07:34:41 · answer #1 · answered by Anonymous · 1⤊ 0⤋

X=3
Y=-1

2006-12-15 16:09:27 · answer #2 · answered by ROBSON BRANDÃO 3 · 0⤊ 0⤋

x=2-y

2(2-y)+3y=3

4-2y+3y=3

y=-1; x=3

2006-12-15 15:37:50 · answer #3 · answered by Esther 2 · 0⤊ 0⤋