Question

resolva essa equação;
a) - 6x + 9 = - 51
b) 2x - 4 + 6 = 20
c) 5x - 4 = 21
d) - 15 + 5x = 25

Answer 1

Resposta:

a) - 6x + 9 = - 51

- 6x = - 51 - 9

- 6x = - 60

x= - 60/- 6

x= 10

b) 2x - 4 + 6 = 20

2x + 2 = 20

2x = 20 - 2

2x = 18

x= 18/2

x= 9

c) 5x - 4 = 21

5x= 21 + 4

5x= 25

x= 25/5

x= 5

d) - 15 + 5x = 25

5x= 25 + 15

5x= 40

x= 40/5

x= 8