Question

2. Calcule o valor de x.

a) 5x + 5 = 20

b) 2x + 3 = 13

c) 10x + 10 = 40

d) 2x - 3 = 17​

Answer 1

A) 5x + 5 = 20 -> 20 - 5 = 5x -> 5x = 15 -> x = 3
B) 2x + 3 = 13 -> 13 - 2x = 3 -> x = 5
C) 10x + 10 = 40 -> 40 - 10x = 10 -> 10x = 30 -> x = 3
D) 2x - 3 = 17 -> 17 + 3 = 2x -> 2x = 20 -> x = 10

Answer 2

Resposta:

A) 5x= -5 + 20

5x= 15

x= 15

5

x= 3

B) 2x= -3+13

2x= 10

x= 10

2

X= 5

C) 10x= -10+40

10x= 30

x= 30

10

x= 3

D) 2x= 3+17

2x= 20

X= 20

2

X= 10