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zhannawk [14.2K]
3 years ago
15

When 54 is added to a number the result is the same as when the number is multiplied by 3. What is the number? Show working out.

Mathematics
2 answers:
egoroff_w [7]3 years ago
6 0
54 + x = x(3)
54 + x = 3x
2x = 54
x = 27
Simora [160]3 years ago
5 0
The number is 18.
54 divides by 3 is 18.
18 plus 54 is 72
18 Times 3 is 72
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Answer:

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Step-by-step explanation:

A) A fórmula para calcular o perímetro de um retângulo é dada como:

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W = largura do retângulo

A) A pergunta nos diz que:

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A expressão algébrica que representa o perímetro do retângulo =

Perímetro de um retângulo = 2 (L + W)

= 2L + 2W

L = 6x, W = 5y

= 2 (6x) + 2 (5y)

= 12x + 10y

A expressão algébrica que representa o perímetro do retângulo é

P = 12x + 10y

B) Se x = 4 cm e y = 7 cm, qual é o valor numérico desse perímetro.

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x = 4cm

y = 7cm

Perímetro = 12 (4) + 10 (7)

Perímetro = 48cm + 70cm

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Portanto, o valor numérico do perímetro é 118cm

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