Question

Resolva as seguintes equações:

Answer 1

a)

x + 5 = 8

x = 8 - 5

x = 3

b)

x - 4 = 3

x = 3 + 4

x = 7

c)

x + 6 = 5

x = 5 - 6

x = - 1

d)

x - 3 = - 7

x = - 7 + 3

x = - 4

e)

x + 9 = - 1

x = - 1 - 9

x = - 10

f)

x + 28 = 11

x = 11 - 28

x = - 17

g)

x - 109 = 5

x = 5 + 109

x = 114

h)

x - 39 = - 79

x = - 79 + 39

x = - 40

i)

3x = 15

x = 15/3

x = 5

j)

2x = 14

x = 14/2

x = 7

k)

4x = - 12

x = - 12/4

x = - 3

l)

7x = - 21

x = - 21/7

x = - 3

m)

13x = 13

x = 13/13

x = 1

n)

9x = - 9

x = - 9/9

x = - 1

o)

25x = 0

x = 0/25

x = 0

p)

x/3 = 7

x = 7 . 3

x = 21

q)

x/4 = - 3

x = - 3 . 4

x = - 12

r)

2x/5 = 4

2x = 4 . 5

2x = 20

x = 20/2

x = 10

t)

2x/3 = - 10

2x = - 10 . 3

2x = - 30

x = - 30/2

x = - 15

u)

3x/4 = 30

3x = 30 . 4

3x = 120

x = 120/3

x = 40

v)

2x/5 = - 18

2x = - 18 . 5

2x = - 90

x = - 90/2

x = - 45