👤

a)
[tex]2 \times + 5 = 27 \\ [/tex]
b)
[tex]4 \times - 8 = 2 \times 6[/tex]


Resposta :

2x + 5 = 27

2x = 27 - 5

x = 22 / 2

x = 11

4x - 8 = 2 × 6

4x - 8 = 12

4x = 12 + 8

4x = 20

x = 20 / 4

x = 5