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ted wrote a three-digit number. He divided it by 14, added 12, and multiplited by 20. His final anser was 600. what number did ted write?

Plese show me how t get the answer. thanks.

just reverse the steps and do the inverse operation

600 รท 20 = 30

30-12 = 18

18 * 14 = 252

so Ted wrote 252

check:
252 divided by 14 is 18
12 added to 18 is 30
30 multiplied by 20 is 600

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