Question

(A) 9 x - 3 = 5x + 17
(B) 15 x - x + 6 = 7x + 13

Answer 1

(A) 9x - 3 = 5x + 17 

9x - 5x = 17 + 3
4x = 20 
x = 20/4 
x = 5 

(B) 15x - x + 6 = 7x + 13
15x - x - 7x = 13 - 6
7x = 7 
x = 7/7
x = 1 

Answer 2

Olá, boa noite ☺

Resoluções:

a)

9x - 3 = 5x + 17

9x - 5x = 17 + 3.

4x= 20.

x=20/4.

x=5

b)

 15x - x + 6 = 7x + 13

15x - x - 7x = 13 - 6.

7x=7.

x=7/7

x=1

Bons estudos :)