Answer:salt + salt = salt
0.04x + 0.09*50 = 0.06(x+50)
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Multiply thru 100 to get:
4x + 9*50 = 6x + 6*50
2x = 3*50
x = 75 grams (amt. of 4% solution needed for the mixture)
Step-by-step explanation:
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