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Setler79 [48]
3 years ago
9

Numa caixa estão berlindes vermelhos,amarelos e azuis: 20%dos berlindes são vermelhos,40% são amarelos e o número de berlindes a

zuis é 80. Quantos berlindes há na caixa
Mathematics
1 answer:
Agata [3.3K]3 years ago
3 0

Answer:

200 berlindes

Step-by-step explanation:

Vamos representar

O número total de berlindes na caixa = X

Mármores vermelhos = 20% de X

= 0.2X

Mármores amarelos = 40% de X

= 0.4X

Mármores azuis = 80

Conseqüentemente,

0.2X + 0.4X + 80 = X

Recolher termos semelhantes

80 = X - 0.2X - 0.4X

80 = X - 0.6X

80 = 0.4X

Divida ambos os lados por 0.4

X = 80 / 0.4

X = 200

Uma vez que X representa o número total de berlindes na caixa, portanto, o número total de berlindes na caixa = 200 berlindes

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