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y=2x/3
reemplazando
x+2x/3 =25
3x/3+2x/3=25
5x/3=25
5x=75
x=75/5
x=15años
y=2(15)/3=10años
buen dia!!
edad mayor = 25-x
x = 2/3( 25 -x)
3x = 2(25 - x)
3x = 50 -2x
3x +2x = 50
5x = 50
x = 50/5
x = 10
edad menor 10 años
edad mayor= 25-x
edad mayor = 25 -10= 15 años