Question

5- Determine o valor de x :
A) 3 ( x + 6 ) = 20
B) x/ 5 + x + 1 = 4

Answer 1

• Isole a incógnita.

A)

3(x + 6) = 20

x + 6 = 20/3

x = 20/3 - 6

x = (20 - 18)/3

x = 2/3

B)

x/5 + x + 1 = 4

x + 5x + 5 = 20

6x + 5 = 20

6x = 20 - 5

6x = 15

2x = 5

x = 5/2

Resposta:

A) x = 2/3

B) x = 5/2