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How much of an alloy with 30% copper must be added to 25 pounds of a second alloy which is 20% copper to create a 27% alloy? 33.85 lb 58.33 lb 391.67 lb

Respuesta :

0.3x+(25)(0.2)=0.27(x+25)Step 1: Simplify both sides of the equation.0.3x+(25)(0.2)=0.27(x+25)Simplify: (Show steps)0.3x+5=0.27x+6.75Step 2: Subtract 0.27x from both sides.0.3x+5−0.27x=0.27x+6.75−0.27x0.03x+5=6.75Step 3: Subtract 5 from both sides.0.03x+5−5=6.75−50.03x=1.75Step 4: Divide both sides by 0.03.0.03x0.03=1.750.03x=58.333333Answer:x=58.33

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