Respuesta:
(1/2)x+3/5 = 8/10 ; 8/10 = 4/5
(1/2)x+3/5 = 4/5
(1/2)x+3/5-3/5 = 4/5-3/5
(1/2)x = 1/5
2(1/2)x = 2(1/5)
(2/2)x = 2/5
x = 2/5
Comprobación :
1/2(2/5)+3/5 = 8/10
2/10+3/5 = 8/10 ; 2/10 = 1/5
1/5+3/5 = 8/10 ; 8/10 = 4/5
4/5 = 4/5
R// " X " Vale 2/5 y por eso la respuesta es la alternativa d ) 2/5 .
Explicación paso a paso:
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Respuesta:
(1/2)x+3/5 = 8/10 ; 8/10 = 4/5
(1/2)x+3/5 = 4/5
(1/2)x+3/5-3/5 = 4/5-3/5
(1/2)x = 1/5
2(1/2)x = 2(1/5)
(2/2)x = 2/5
x = 2/5
Comprobación :
1/2(2/5)+3/5 = 8/10
2/10+3/5 = 8/10 ; 2/10 = 1/5
1/5+3/5 = 8/10 ; 8/10 = 4/5
4/5 = 4/5
R// " X " Vale 2/5 y por eso la respuesta es la alternativa d ) 2/5 .
Explicación paso a paso: