Question

1) Resolva em R as equações a seguir:

a) 3 + x = 0

b) 23x + 2 = 2

c) 12 – 7 + 4x = 25

d) 5x – 3x = 30

e) 4x + 10 = 45 – 3x

Answer 1

a) 3 + x = 0

x = -3

b) 23x + 2 = 2

23x = 2 - 2

23x = 0

x = 0

c) 12 – 7 + 4x = 25

5 + 4x = 25

4x = 25 - 5

4x = 20

x = 20/4

x = 5

d) 5x – 3x = 30

2x = 30

x = 30/2

x = 15

e) 4x + 10 = 45 – 3x

4x + 10 + 3x = 45

7x + 10 = 45

7x = 45 - 10

7x = 35

x = 35/7

x = 5

Answer 2

Vamos lá :

a)

3 + x = 0

x = - 3

b)

23x + 2 = 2

23x = 2 - 2

23x = 0

x = 0

c)

12 – 7 + 4x = 25

5 + 4x = 25

4x = 25 - 5

4x = 20

x = 20/4 = 5

d)

5x – 3x = 30

2x = 30

x = 30/2 = 15

e)

4x + 10 = 45 – 3x

4x + 3x = 45 - 10

7x = 35

x = 35/7 = 5

Espero ter ajudado !!!