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5Question: A soil microbiologist purchases 5 units of bacterial culture X and 3 units of fungus Y for \$45.00, and 2 units of X and 4 units of Y for \$32.00. What is the cost of one unit of X in cents?
Solution: Let $ x $ be the cost of one unit of X (in dollars) and $ y $ be the cost of one unit of Y (in dollars). The system of equations is:
5x + 3y = 45.00 \\
2x + 4y = 32.00