Question

Descubra o valor de x na P.A a seguir:( x + 8, 2 x + 2, 6 x + 4)

Answer 1

2x +2 - (x + 8) = 6x + 4 - (2x + 2)
2x + 2 -x - 8 = 6x + 4 - 2x - 2
2x - x - 6x + 2x = 4 - 2 + 8 - 2
-3x = 8
x = ⁻⁸/₃