A metalworker has a metal alloy that is 25% copper and another alloy that is 70% copper. How many kilograms of each alloy shou ld the metalworker combine to create 100 kg of a 61% copper alloy?
2 answers:
Answer:
Step-by-step explanation:
let 25 % copper=x kg
75 % copper=(100-x) kg
0.25 x+(100-x)*0.75=100*0.61
25x+7500-75 x=6100
-50 x=-1400
50 x=1400
5x=140
x=28
25 % of Copper=28 kg
75 % of Copper=100-28=72 kg
Answer:
28kg for copper
Step-by-step explanation:
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