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a/b= 1,02
Despejamos en ambas ecuaciones la misma variable (a)
a= 2020 - b
a= 1.02* b
igualamos las ecuaciones
2020 - b = 1.02b
Despejamos la variable b
1.02b +b = 2020
2.02b = 2020
b= 2020/2.02
b = 1000
Si b = 1000 entonces a =
a+1000 = 2020
a = 2020 -1000
a= 1020
1020/1000 = 1.02