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Bruhreally
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Algebra
2 kg of iron melted with 7 kg of other metals makes the alloy. If 1440 kg of the alloy was required, how many kilograms of iron should be used?
AlgebraHouse
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Re: Algebra
If 2 kg of iron and 7 kg of others are melted, the ratio of iron to total is 2:9
2 x
— = —— {set up a proportion}
9 1440
2880 = 9x {crossmultiplied}
x = 320
320 kg of iron
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