Question

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Answer 1

daveboy changes his picture every 3 days.

Answer 2

how cares? :/

Answer 3

here we know that how to subtract a number from both sides because to find the answer in the equation it is necessary to have x on a side and the other constants on the other side. hence to get x on a side and constants on the other side , we subtract the same number from both sides who is attached with variable with addition sign.

hope it helps