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5/7 + x = 2
x = 2 - 5 /7
x = 2*7/7 - 5/7
x = 14/7 - 5/7
x = ( 14 - 5)/7
x = 9/7
Respuesta.
A 5/7 le faltan 9/7 para ser gual a 2
2 equivale a 14/7
Entonces, en fracciones homogéneas se resta solo los numeradores:
14/7-5/7 = 9/7
Rpta.- Para 2 enteros, a 5/7 le falta 9/7.