Variable = tree liquid laundry detergent, lemon extractVariables = clean cloth.The variable control = the concentration of the liquid extract lemon grass. Variable = tree liquid laundry detergent, lemon extractVariables = clean cloth.The variable control = the concentration of the liquid extract lemon grass. Independent variable = washing liquid from extracts of lavender.Dependent = clean cloth.Control variable = concentration of washing liquid from extracts of lavender.
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