Question

69) Resolva as
a) 2x = -4
equações seguintes, sendo U = Q:
b) 4x + 3 = 11 c) x + 1 + 2x = 5x + 11
d) 2.(x + 3) - 4.(x - 2) = -2​

Answer 1

Resposta:

Olá boa tarde!

a) 2x = -4

x = -4 : 2

x = -2

S = { x ∈ Q| x = -2}

b) 4x + 3 = 11

4x = 11 -3

4x = 8

x = 8 : 4

S = { x ∈ Q| x = 2}

c) x + 1 + 2x = 5x + 11

x - +2x - 5x = 11 - 1

-4x = 10

x = 10/4

x = 5/2

S = { x ∈ Q| x = 5/2}

d) 2.(x + 3) - 4.(x - 2) = -2​

2x + 6 - 4x + 8 = -2

-2x = -2 - 8 - 6

-2x = -16

2x = 16

x = 16 : 2

x = 8

S = { x ∈ Q| x = 8}