document.write( "Question 298047: how many grams of gold alloy that costs $4 per gram must be mixed with 30 grams of a gold alloy that costs $7 per gram to make an alloy that costs $5 per gram? \n" ); document.write( "
Algebra.Com's Answer #214512 by nyc_function(2741)\"\" \"About 
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4x + 30(7) = 5(x + 30)\r
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