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edad de antonio =x
3x+x = 40
4x = 40
x = 40/4
x = 10
edad de antonio = 10 años
edad de francisco = 3*10= 30 años
prueba
4x = 40
4*10 = 40
40 =40
• Edad de antonio = x/3
Además:
x + x/3 = 40
4x/3 = 40
4x = 120
x = 30
pero, si x = 30 , tendriamos que:
• Edad de francisco = x = 30 años
• Edad de antonio = x/3 = 30/3 = 10 años
Eso es todo!!