Question

1º) Resolva as equações:

a) 4x – 6 = 22

b) 9 – x = 2x

c) 8 + 4x = 6x – 4

d) 3x + 1 = x + 9



2º) Simplifique e resolva as equações:

a) 4x – 3 – x + 8 = 11

b) 6.(x – 2) = 12

c) 9 + 2 . (5x – 4) = 21

d) 10x + 4 .(3 – 2x) – 6 = 8

e) 3.(5 + 3x) + 5. (-x-1) = 22

f) 2. (9x – 4) – 7 + (6 – 5x) . 3 = 18

g) 16x + 2. (7x + 8) – 9 = 67

h) 12 + (3x + 6) . (-7) – 5 = 70

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Answer 1

Resposta:

1°)

A) 4x - 3 - x + 8 = 11

3x = 3 - 8 + 11

3x = 6

x = 6/3

X = 2

B) 9 - X = 2x

-x - 2x = -9

-3x = -9

X = -9/-3

x = 3

C) 8 + 4x = 6x – 4

-6x + 4x = -8 - 4

-2x = -12

X = -12/-2

x = 6

D) 3x + 1 = x + 9

3x - x = -1 + 9

2x = 8

x = 8/2

X = 4

2°)

A) 4x – 3 – x + 8 = 11

3x = 3 - 8 + 11

3x = 6

X = 2

B) 6.(x – 2) = 12

6x - 12 = 12

6x = 12 + 12

6x = 24

x = 4

C) 9 + 2 . (5x – 4) = 21

9 + 10x - 8 = 21

10x = 21 - 1

10x = 20

x = 2

D) 10x + 4 .(3 – 2x) – 6 = 8

10x + 12 - 8x - 6 = 8

2x = -6 + 8

2x = 2

x = 1

E) 3.(5 + 3x) + 5. (-x-1) = 22

15 + 9x - 5x - 5 = 22

4x = -10 + 22

4x = 12

x = 3

F) 2. (9x – 4) – 7 + (6 – 5x) . 3 = 18

18x - 8 - 7 + 18 - 15x = 18

3x = -3 + 18

3x = 15

X = 5

G) 16x + 2. (7x + 8) – 9 = 67

16x + 14x + 16 - 9 = 67

30x = -7 + 67

30x = 60

X = 2

H) 12 + (3x + 6) . (-7) – 5 = 70

12 - 21x - 42 - 5 = 70

-21x = -12 + 42 + 5 + 70

-21x = 105

x = -5