solve linear equation-an alloy of metal is 25% copper. Another alloy is 50% copper. how much of each alloy should be used to make 1000 grams of an alloy that is 45% copper

Answer 1

if x g is the 25% copper alloy used, then 1000-x g must be the 50% alloy

does the equation

25/100(x) + 50/100(1000-x) = 45/100(1000)
make any sense to you?