Question

A) 17.6 - 7.x = x + 18.

B)5.x+6x-16=3.x+2.x-4

C)8.a+13=15

D)18.k-20=15k+1​

Answer 1

Resposta:

a) x = 21/2

b) x = 2

c) a = 1/4

d) k = 7

Explicação passo a passo:

a) 17.6 - 7.x = x + 18.

102 - 7x = x + 18

-7x - x = 18 - 102

-8x = -84

x = -84/-8

x = 21/2

B)5.x+6x-16=3.x+2.x-4

11x - 16 = 5x - 4

11x - 5x = -4 + 16

6x = 12

x = 12/6

x = 2

C)8.a+13=15

8a = 15 - 13

8a = 2

a = 2/8

a = 1/4

D)18.k-20=15k+1​

18k - 15k = 1 + 20

3k = 21

k = 21/3

k = 7