SOLUTION: A 59% copper alloy is made by mixing 20g of a 43% copper alloy with some 63% copper alloy. The number of grams of 59% copper alloy produced is a) 120 b)110 c)100 d)90 e) 80

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Question 1116744: A 59% copper alloy is made by mixing 20g of a 43% copper alloy with some 63% copper alloy. The number of grams of 59% copper alloy produced is
a) 120 b)110 c)100 d)90 e) 80
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
%2863x%2B43%2A20%29%2F%28x%2B20%29=59

63x%2B43%2A20=59%28x%2B20%29
63x%2B860=59x%2B1180
4x=1180-860
4x=320
x=80--------Add 80 grams of the 63% copper


Amount of new alloy made: 100 grams