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Procedimiento
Vamos a asignarle la variable x a el número que estamos buscando.
Establécemos la ecuación
1/2x = 3/5x +2
1/2x - 3/5x = 2
-0.1x = 2
x = 2/-0.1
x = -20
1/4x = ?
1/4(-20) = -5