Question

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Resolva as equações:

a) 4x + 10 = x – 5

b) 5x – 4 + 2x = 10

c) 6x – 24 = 0

d) 3x – 12 = 36

e) 4x – 5 = 15

f) 2x + 12 = 20

g) 5x = 30

Answer 1

a) 4x + 10 = x – 5

4x - x = -5 - 10

3x = -15

x = -15/3

x = -5

b) 5x – 4 + 2x = 10

5x + 2x = 10 + 4

7x = 14

x = 14/7

x = 2

c) 6x – 24 = 0

6x = 24

x = 24/6

x = 4

d) 3x – 12 = 36

3x = 36 + 12

3x = 48

x = 48/3

x = 16

e) 4x – 5 = 15

4x = 15 + 5

4x = 20

x = 20/4

x = 5

f) 2x + 12 = 20

2x = 20 - 12

2x = 8

x = 8/2

x = 4

g) 5x = 30

x = 30/5

x = 6

Answer 2

Resposta:

A- 4x + 10 = x - 5

4x - x= -5 - 10

3x = -15

x = -15÷3

x = -5

B- 5x - 4 +2 = 10

5x = 10 + 4 -2

5x = 12

x = 12÷5

x=2,4

C- 6x - 24 = 0

6x = 0 + 24

6x = 24

x = 24÷6

x = 4

D- 3x - 12 = 36

3x = 36 - 12

3x = 24

x = 24÷3

x=8

E- 4x - 5 = 15

4x = 15+5

4x = 20

x = 20÷4

x = 5

F- 2x + 12 = 20

2x = 20 - 12

2x = 8

x = 8÷2

x = 4

G- 5x = 30

x = 30÷5

x = 7