MATH HELP PLEASSSE!!!!! 10 pts. best answer!
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MATH HELP PLEASSSE!!!!! 10 pts. best answer!

[From: ] [author: ] [Date: 11-08-24] [Hit: ]
now, all you have to do is solve for x, and then plug that value into y=40-x to find the weight of the 75% alloy-you are smart!!!!......
how many grams of a 50% - silver alloy shoould be mixed with a 75% -silver alloy to obtain 40 grams of a 60%- silver alloy? i got the answer in the back of the book, i just need help solving it. thanks!

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First step -- let's write a "let statement":

let x = the number of grams of the 50% alloy
let y = the number of grams of the 75% alloy

so, 0.50*x +0.75*y = 0.60*40g

BUT, we know that we have forty grams total

x+y = 40, so y= 40-x

putting it back in our original equation,

0.50*x+0.75*(40-x) = 0.60*40 g

now, all you have to do is solve for x, and then plug that value into y=40-x to find the weight of the 75% alloy

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you are smart!!!!!!!!!!!!!!!!!!!!!!!!

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