Mixture problem

Ziggy's Famous Yogurt blends regular yogurt that is 3% fat with its no-fat yogurt to obtain low-fat yogurt that is 1% fat. How many pounds of regular yogurt and how many pounds of no-fat yogurt should be mixed to obtain 60 pounds of low-fat yogurt?

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x + y = 60
x*3% = 60 * 1%
From the second equation, we get 0.03x = 0.6, then x = ...