Question

13) X - (2x - 1) = 23
14) 2x - (x - 1) = 5 - (x - 3)​

Answer 1

Resposta:

13)

x - (2x - 1) = 23

x - 2x + 1 = 23

- x + 1 = 23

- x = 23 - 1

- x = 22 • (- 1)

x = - 22

14)

2x - (x - 1) = 5 - (x - 3)

2x - x + 1 = 5 - x + 3

2x + 1 = 5 + 3

2x + 1 = 8

2x = 8 - 1

2x = 7

x = 7/2

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