Explicación:
Carlos: X
Alberto: x - 90
José: (X -90)3
X + X -90 + (x-90)3 = 1090
2x - 90 + 3x -270 = 1090
2x - 90 + 3x = 1360
2x +3x = 1450
5x = 1450
X = 1450/5
X=290
Carlos: 290
Alberto:200
José: 600
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Explicación:
Carlos: X
Alberto: x - 90
José: (X -90)3
X + X -90 + (x-90)3 = 1090
2x - 90 + 3x -270 = 1090
2x - 90 + 3x = 1360
2x +3x = 1450
5x = 1450
X = 1450/5
X=290
Carlos: 290
Alberto:200
José: 600