Respuestas

  • Usuario de Brainly
2012-04-07T23:44:50+02:00

X = 400

 

X + X/4 = 400 - 2X

 

(4X + X) / 4 = 400 - 2X

 

4X + X = 4 (400 - 2X)

 

5X = 1600 - 2X

 

5X + 2X = 1600

 

7X = 1600

 

X = 1600/7

 

X = 228.5