Question

17. Resolva as equações a seguir.
a) 6x + 2(x - 1) = 14
c) 3(x-2) +5 = 5
d) - 3x - 3(x-3) = 3
b) 4x - 2(x - 5) = 10​

Answer 1

Resposta:

a) 6x + 2(x - 1) = 14

6x+2x-2=14

6x+2x=14+2

8x=16

x=16/2

x=8

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

3x-6+5=5

3x=5+6-5

3x=6

x=6/3

x=2

d) - 3x - 3(x-3) = 3

-3x-3x+9=3

-3x-3x=3-9

-6x=- -6

x= -6/-6 (-1)

x=1

b) 4x - 2(x - 5) = 10

4x-2x+10= 10

4x-2x= 10-10

2x=0

x= 2