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x+y=14
2x-1=y
sustitutimos y=2x-1 en la primera ecuacion:
x+y=14
x+2x-1=14
3x-1=14
3x=14+1
3x=15
x=15/3
x=5
si x=5
x+y=14
5+y=14
y=14-5
y=9
el cochue mide 5 m y el autobus mide 9 m