Question

Matemática 7 ano ...

Answer 1

Oieee

Bom,

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• Regra de três

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1)

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A) 10/7 = 50/x

10x = 50(7)

10x = 350

x = 350/10

x = 35

R) x = 35

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B) x/5 = 21/35

35x = 21(5)

35x = 105

x = 105/35

x = 3

R) x = 3

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C) 5/x + 4 = 30/54

30(x + 4) = 5(54)

30x + 120 = 270

30x = 270 - 120

30x = 150

x = 150/30

x = 5

R) x = 5

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D) x/7 = 15/35

35x = 7(15)

35x = 105

x = 105/35

x = 3

R) x = 3

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E) 18/x = 6/15

6x = 18(15)

6x = 270

x = 270/6

x = 45

R) x = 45

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F) x/7 = 15/35

35x = 15(7)

35x = 105

x = 105/35

x = 3

R) x = 3

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