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Suplemento = 180 - x
Complemento = 90 - x
(90-x )+ (180- (180- (90- x) = 20
(90-x )+ (180- (90 +x) =20
90-x + 90 - x = 20
180 - 2x = 20
-2x =-160
x = 80
Hallar el suplemento del complemento del complemento del suplemento:
180- ( 90- (90- (180-x )
180- (90- (90- 100)
180- (90+ 10)
180- 100
80
Saludos.