Cake and lemonade

Three cakes and two lemonades cost € 3 and 21 cents. Three cakes and three lemonades cost € 3 and 99 cents. How many cents does one cake cost, and how much does one lemonade cost?

Final Answer:

x =  55
y =  78

Step-by-step explanation:

3x+2y=321 3x+3y = 399  y=399321=78 x=399/3y=399/378=55



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