Respostas

2014-08-01T23:28:36-03:00
Vamos lá ;

Complemento = ( 90 - x )
Suplemento   = ( 180 - x )

3.1/4 ( 180 - x ) + 90 - x = 2.x

3/4 ( 180 - x ) + 90 - x = 2.x

(540 - 3x / 4 ) + 90 - x = 2.x

MMC : 

540 - 3x + 360 - 4x / 4 = 2.x

900 - 7x / 4 = 2.x

900 - 7x = 8.x

8x + 7x = 900

15 x = 900

x = 60°