so the price is C and 20 cakes is T
So 1 cake times 20=20 cakes so 20C=T
The total cost of buying 20 cakes at a price of £C each can be expressed using the formula T = 20C. This means you multiply the cost of one cake by the number of cakes. Thus, if you know the price of one cake, you can easily find the total cost for 20 cakes.
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