Respuesta :
ana= x--------30
juan=y--------42
------------
52
x+18 = 2(y-18)
y+12= 3(x-12)
x+18= 2(y-18)
x= 2y -54
reeplazo
y+12= 3(2y-54)-36
y+12= 6y- 162-36
198+12=6y-y
210 =5y
42=y
x+18= 2(42-18)
x+18= 48
x= 30
juan=y--------42
------------
52
x+18 = 2(y-18)
y+12= 3(x-12)
x+18= 2(y-18)
x= 2y -54
reeplazo
y+12= 3(2y-54)-36
y+12= 6y- 162-36
198+12=6y-y
210 =5y
42=y
x+18= 2(42-18)
x+18= 48
x= 30