Question

determine o valor de x

Answer 1

$

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b) 

3/5 = x/(24 - x)

72 - 3x = 5x

5x + 3x = 72

8x = 72

x = 72/8 = 9

d)

(x + 2)/(x + 5) = 4/(x + 2)

(x + 2)² = 4*(x + 5)

x² + 4x + 4 = 4x + 20

x² + 4 = 20

x² = 16

x = 4

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