Question

resolva as equações

a) x+5:8

b) x-4:3

c)×+6:5

d)x-7:7

e)x+9:1

f)x+28:11

g) x-109:5

h)x-39:-79

i)10:x+9

j)15:x+20

k)4:x-10

l)7:x+8

m)0:x+12

n)-3:x+10​

Answer 1

Resposta:

Explicação passo-a-passo:

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 - 7 = - 7

x = - 7 + 7

x = 0

*********************

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)

10 = x + 10

10 - 10 = x

0 = x

x = 0

*****************************

j)

15 + x = 20

x = 20 - 15

x = 5

*************************

k)

4 = x - 10

4 + 10 = x

14 = x

x = 14

***********************

l)

7 = x + 8

7 - 8 = x

- 1 = x

x = - 1

****************************

m)

0 = x + 12

0 - 12 = x

- 12 = x

x = - 12

*********************

n)

- 3 = x + 10

- 3 - 10 = x

- 13 = x

x = - 13