Question

1) RESOLVA AS FRAÇOES

a) X/2 - X/4 = 1/2

b) X/2 - X/4 = 5

c) X/5 + X/2 = 7/10

d) X/5 + 1 = 2X/3
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Answer 1

Oi....

Resolução:

a)

x/2 - x/4 = 1/2 ⇒mmc 2, 4, 2 = 4

2x - x = 2

x = 2

 

b)

x/2 - x/4 = 5 ⇒mmc 2, 4 = 4

2x - x = 20

x = 20

c)

x/5 + x/2 = 7/10 ⇒mmc 5, 2, 10 = 10

2x + 5x = 7

7x = 7

x = 1

d)

x/5 + 1 = 2x/3 ⇒mmc 5, 1, 3 = 15

3x - 10x = - 15

- 7x = - 15⇒(- 1)

7x = 15

x = 15/7

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