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LuanaAires
@LuanaAires
November 2019
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Responda
A)x+3y=19
3x+y=9
B)3x+5y=-22
X-y=-2
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Comentários (9)
Luaninha, meu amor kkkk
a) x + 3y = 19 ---------> x = 19-3y
Substituindo na outra equação temos que:
3(19-3y) + y = 9
57-9y +y = 9
-8y = -48 (-1)
8y = 48
y = 6
x = 1
b) x-y = -2 -----------> x = -2+y
Substituindotemos que:
3(-2+y) + 5y = -22
-6 +3y + 5y = -22
8y = -16
y = -2
x = -4
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LuanaAires
Meu amor?
LuanaAires
Ata,obrigada
LuanaAires
!!
LuanaAires
Vc pode me ajudar nessa:x+y=2
LuanaAires
Ops
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Lista de comentários
a) x + 3y = 19 ---------> x = 19-3y
Substituindo na outra equação temos que:
3(19-3y) + y = 9
57-9y +y = 9
-8y = -48 (-1)
8y = 48
y = 6
x = 1
b) x-y = -2 -----------> x = -2+y
Substituindotemos que:
3(-2+y) + 5y = -22
-6 +3y + 5y = -22
8y = -16
y = -2
x = -4