Question

Resolva as equações:

a) 5x -2(x-3) + 6 = x -15

b) -2x +3(x+2) -2x = x + 11​

Answer 1

a)

5x - 2(x - 3) + 6= x - 15

5x - 2x + 6 + 6= x - 15

5x - 2x - x= - 15 - 6 - 6

2x= - 27

x= - 27/2

x= - 13,5

b)

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

- 2x + 3x + 6 - 2x= x + 11

- 2x + 3x - 2x - x= 11 - 6

- 1x= 5 >> .(-1)

1x= 5

x= 5/1

x= 5

Answer 2

Resposta:

a) 5x -2(x-3)+6=x-15

5x-2x+6+6=x-15

3x -x=-15-12

2x=27

x=27÷2= 13,5

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

-2x+3x+6-2x=x+11

-2x-2x-x+3x=11-6

-2x=5

x=5÷2=2,5