Question

Descubra o valor de x nas P.A a seguir:
P.A=( 2x + 3, 4x + 6, 8x + 8)

Answer 1

Razão = 4x+6-(2x+3) = 4x+6-2x-3 = 2x+3

8x+8=2x+3+(3-1).2x+3
8x+8=2x+3+4x+6
8x+8=6x+9
2x=1
x=1/2