Question

resolva as seguintes equacoes ​

Answer 1

Resposta:

c) 2 ( x - 6 ) = - 3 ( 5 + x )

2x - 12 = - 15 - 3x

2x - 12 + 12 = 0

2x = - 15 - 3x + 12

2x = - 3x - 3

2x + 3x = - 3 + 3x

5x = - 3

x = - 3:5

x = - 3/5

e) 7 ( x - 2 ) = 5 ( x + 3 )

7x - 14 = 5x - 15

7x - 14 + 14 = 0

7x = 5x + 15 + 14

7x = 5x + 29

7x - 5x = 29 - 5x

2x = 29

x = 29:2

x = 29/2

f) 7x - 1 = 13

7x - 1 + 1 = 0

7x = 13 + 1

7x = 14

x = 14:7

x = 2