document.write( "Question 1091143: How much of an alloy that is 10% copper should be mixed with 200 ounces of an alloy that is 90% copper in order to get an alloy that is 30% ​copper? \n" ); document.write( "
Algebra.Com's Answer #705547 by josgarithmetic(39618)\"\" \"About 
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x, how much 10% alloy\r
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\n" ); document.write( "\n" ); document.write( "\"%28200%2A90%2B10x%29%2F%28x%2B200%29=30\"\r
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\n" ); document.write( "\n" ); document.write( "Solve the equation. It gives what you want. You need to know how to form the equation.\r
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