Question

Utilizando a propriedade distributiva da multiplicação, resolva as equações: a) 3(x + 3) = -12
b) -2(5 – x) = 6
c) 8x = 5(x + 6)
d) 4 + 3x = – (2x - 7)
e) -5x – 2(x - 7) = 0
f) 4(x - 1) – 3(x – 6) = 0
g) 3(2x – 1) = 5(1 - x) + 3
h) 7x + (- x + 5) = 2(2x – 3)

Answer 1

Resposta:

3x+9=-12

3×=-12-9

3x= - 21

x= -21/3

x= -7

-10+2x=6

2x = 6+10

2x = 16

x= 16/2

x=8

8x= 5x +30

8x- 5x= 30

3x=30

x= 30/3

x=10

4+3x= -2x +7

5x= +7-4

x= 3/5

-5x -2x +14=0

-7x = -14 (-1)

7x = 14

x= 14/7

x=2

4x -4 - 3x +18=0

x= -18+4

x= -14

6x -3 = 5- 5x+3

6x+5x= 5+ 3+3

11x= 11

x= 1

7x - x+5= 4x -6

7x -x-4x= -6-5

2x= -11

x= -11/2

x= -5,5

Answer 2

Resposta:

a)

x + 3 = -4

x = -7

b)

5 - x = -3

x = 8

c)

8x = 5x + 30

3x = 30

x = 10

d)

4 + 3x = -2x + 7

5x = 3

x = 3/5

e)

-5x - 2x + 14 = 0

7x = 14

x = 2

f)

4x - 4 - 3x + 18 = 0

x = -14

g)

6x - 3 = 5 - 5x + 3

11x = 8 + 3 = 11

x = 1

h)

7x - x + 5 = 4x - 6

2x = -11

x = -11/2