Question

resolva a equaçao:

A) 3x+3=18
B)10x=20=9x
C)2(x+3)=30

Answer 1

Olá,

A) 3x + 3 = 18

3x + 3 − 3 = 18 − 3

3x = 15

15/3

x = 5

B) 10x = 20 = 9x (não entendi)

C) 2(x + 3) = 30

(2) (x) + (2) (3) = 30

2x + 6 = 30

2x + 6 − 6 = 30 − 6

2x = 24

24/2

x = 12