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a = Finos de barbacoa
b = Espíritu del ecuador
60% = ( 0.6 ) = 3/5
Según la información:
2a + 4b = 26
Pero a = ( 0.6 )b, entonces:
2a + 4b = 26
2( 0.6 )b + 4b = 26
2( 3/5 )b + 4b = 26
( 6/5 )b + 4b = 26
b ( 6/5 + 4 ) = 26
b ( 26/5 ) = 26
b = 26 / ( 26/5 ) = ( 26 * 5 ) / ( 26 ) = 5
b = $ 5 ← Precio del chocolate b
Regresamos a la fórmula planteada de primero:
2a + 4b = 26
Pero b = 5, entonces:
2a + 4(5) = 26
2a + 20 = 26
2a = 26 - 20 = 6
a = 6/2 = $ 3 ← Precio de a
Espero haberte ayudado, saludos!