Denotemos Costo de la memoria com CM y el del disco duro como CD
CD+CM = 2800
CD*1.1 + CM*1.15 = 3120
CD = 2800 - CM
(2800 - CM)*1.1 + CM*1.15 = 3120
3080 -CM*1.1 + CM*1.15 = 3120
3080 + (CM)(-1.1+1.15) = 3120
3080 + CM ( 0.05 ) = 3120
CM(0.05)= 3120 - 3080
CM(0.05)= 40
CM = 40 /0.05
CM = 800
CD = 2800 - 800
CD = 2000
Comprobacion
Calculando la venta de $3120
2000 * 1.1 + 800 * 1.15 = $3120
2200 + 920= 3120
3120 = 3120
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Denotemos Costo de la memoria com CM y el del disco duro como CD
CD+CM = 2800
CD*1.1 + CM*1.15 = 3120
CD = 2800 - CM
(2800 - CM)*1.1 + CM*1.15 = 3120
3080 -CM*1.1 + CM*1.15 = 3120
3080 + (CM)(-1.1+1.15) = 3120
3080 + CM ( 0.05 ) = 3120
CM(0.05)= 3120 - 3080
CM(0.05)= 40
CM = 40 /0.05
CM = 800
CD+CM = 2800
CD = 2800 - CM
CD = 2800 - 800
CD = 2000
Comprobacion
Calculando la venta de $3120
CD*1.1 + CM*1.15 = 3120
2000 * 1.1 + 800 * 1.15 = $3120
2200 + 920= 3120
3120 = 3120