Question

Resolva as expressões :

Answer 1

Resposta:

A) 8   B) -3,5  C) -13   D) 8  E) -10  F) 5  G)-8  H) 4,8   I) 0    J)  2,6

Explicação passo-a-passo:

a)  K- 17 = -9

k = -9 + 17

k = 8

b) 2K = -7

k = -7 / 2

k= - 3,5

c) 3k+2 = 2k -11

3k - 2k = -11 - 2

k = -13

d) 2K = 16

k= 16/2

k= 8

e) K/2 = -5

k = -5 . 2

k = -10

f)2K + 14 = 5K - 1

2k - 5k = -1-14

-3 k = -15

(-3 k = -15) . -1

3 k = 15

k= 15/3

k = 5

g) 4K - 5 = 6K + 11

4k - 6k = 11 + 5

(-2k = 16) . -1

2k = - 16

k= -16/2

k = -8

h)2K/3 + 1/2 = K/4 - 3/2

2k/3 - k/4  = - 3/2 - 1/2

8k -3k              4

---------   =   -----------

   12                   2

5k / 12 = 4/2

5k=  4/2 . 12

5k =  48/2

5k = 24

k = 24/5

k =  4,8

i)K/3 -1 + 3/4 = K/2 - 1/4

k/3 - k/2 = -1/4 + 1 - 3/4

2k-3k         -1   +  4   -  3

--------  =    ------------------

 6                         4

- k/6 = 0

k  = 0 . 6 = 0

j) 7(K-1) - 2 (3-K) = 0

7k - 7 - 6 - 2k = 0

5k = 7+6

5k = 13

k = 13/5

k = 2,6