What is the answer for this math problem ^
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How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?
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X+y=-4 x-y=2 use elimination with adding and subtraction
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Find the missing factor. write your answer inexponential form.9^2=9^4×
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