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10-04-2018
Mathematics

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Solve using inverse operations

1. 5x + 10 = 15

2. r/4 - 1 = 4

Respuesta :

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10-04-2018

1)

5x + 10 = 15
- 10 - 10

5x = 5

x = 1

2)

r/4 - 1 = 4
+ 1+ 1

r/4 = 5
*4 *4

r = 20

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