Respuesta :
X = 9/10 - 2/3
X = (9*3/10*3) - (2*10/3*10)
To sum or sub you need same deno
X = (27 - 20) / 30
X = 7 / 30
X = (9*3/10*3) - (2*10/3*10)
To sum or sub you need same deno
X = (27 - 20) / 30
X = 7 / 30