Question

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Answer 1

Resposta:

01) a) x + 2 = 129

x + 2 - 2 = 0

x = 129 - 2

x = 127

b) x - 27 = 129

x - 27 + 27 = 0

x = 129 + 27

x = 156

c) 27 + 129 = x

x = 27 + 129

x = 156

d) x + 27 + x = 129

x + x + 27 = 129

2x + 27 = 129

2x + 27 - 27 = 0

2x = 129 - 27

2x = 102

102 ÷ 2

x = 51

2) 3x + 2 = 5x - 8

3x  + 2 - 2 = 0

3x = 5x - 8 - 2

3x = 5x - 10

- 2x = - 10

- 10 ÷ - 2

x = 5