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Luizaaa321
@Luizaaa321
December 2019
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Gente, tem como responder? E para resolver o sistema
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Para resolver um sistema, basta isolar a icognita em uma das equações e substituir na outra:
Ex:
x-y=-9
x=y-9
Agora temos o valor de x, basta substituir na outra equação:
x+y=3
(y-9)+y=3
y+y=3+9
2y=12
y=6
Achamos o valor exato de y, agora só falta achar o x, e para isso, substituimos y em qualquer uma das equações:
x+y=3
x+(6)=3
x=3-6
x=-3
Temos então que
x=-3 e y=6
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Lista de comentários
Ex:
x-y=-9
x=y-9
Agora temos o valor de x, basta substituir na outra equação:
x+y=3
(y-9)+y=3
y+y=3+9
2y=12
y=6
Achamos o valor exato de y, agora só falta achar o x, e para isso, substituimos y em qualquer uma das equações:
x+y=3
x+(6)=3
x=3-6
x=-3
Temos então que x=-3 e y=6