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patriciapujals
@patriciapujals
March 2022
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Num estacionamento há carros e motos num total de 60 veículos e 212 rodas.Quantas motos há no estacionamento?
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AntoniLAD
Verified answer
X+y=60 .(-2)
4x+2y=212
-2x-2y=-120
4x+2y=212
Somando e subtraindo:
-2x+4x/-2y+2y/212-120
2x 0 92
2x=92
x=92/2
x=46
Voltando ao sistema anterior:
x+y=60
46+y=60
y=60-46
y=14
Há 46 carros e 14 motos
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Thanks 1
patriciapujals
Obrigada!!!!!!!
AntoniLAD
:)
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Verified answer
X+y=60 .(-2)4x+2y=212
-2x-2y=-120
4x+2y=212
Somando e subtraindo:
-2x+4x/-2y+2y/212-120
2x 0 92
2x=92
x=92/2
x=46
Voltando ao sistema anterior:
x+y=60
46+y=60
y=60-46
y=14
Há 46 carros e 14 motos