Respuesta:
-1/70
Explicación paso a paso:
( -3/10 + 2/8 ) - ( 1 - 3/7 + 1/4 )
-4/80 - ( -2/7 + 1/4 )
-4/80 - ( -1/28 )
-4/80 + 1/28
-112 + 80 / 2240
-32/2240
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Respuesta:
-1/70
Explicación paso a paso:
( -3/10 + 2/8 ) - ( 1 - 3/7 + 1/4 )
-4/80 - ( -2/7 + 1/4 )
-4/80 - ( -1/28 )
-4/80 + 1/28
-112 + 80 / 2240
-32/2240
-1/70