Respuesta :

8x - 6 = 4x + 30

solve for x

8x - 4x = 30 + 6

4x = 36

Divide both-side by 3

x = 9

XD= 8x - 6

substitute x = 9 in 8x - 6

XD = 8(9) - 6

=72 - 6

=66