Question

9- Resolva as equações:

a) 5(x + 1) = 10

b) 3(x-2) – 11 =- 2

c) – 2 ( x – 1 ) + 7 = 15

d) 5 – 3 ( x + 2 ) =-1

e) 10 ( x – 1 ) = - 20

f) – 10 (x – 1 ) = - 20​

Answer 1

Resposta:

a) 1

b) 5

c) -3

d) 0

e) -1

f) 3

Explicação passo-a-passo:

a) 5(x + 1) = 10

5x + 5 = 10

5x = 10 - 5

5x = 5

x = 5/5

x = 1

b) 3(x - 2) - 11 = -2

3x - 6 = -2 + 11

3x = 9 + 6

3x = 15

x = 15/3

x = 5

c) -2(x - 1) + 7 = 15

-2x + 2 = 15 - 7

-2x = 8 - 2

-2x = 6

x = 6/(-2)

x = -3

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

-3x - 6 = -1 - 5

-3x = -6 + 6

-3x = 0

x = 0/(-3)

x = 0

e) 10(x - 1) = -20

10x - 10 = -20

10x = -20 + 10

10x = -10

x = (-10)/10

x = -1

f) -10(x - 1) = -20

-10x + 10 = -20

-10x = -20 - 10

-10x = -30

x = (-30)/(-10)

x = 3