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The sum of 42 and a number x is 51

1 Answer

5 votes

Answer:

x = 9

Explanation:

"The sum of 42 and a number x is 51" in "mathy" words:

42 + x = 51

Then, subtract both sides by 42:

42 + x - 42 = 51 - 42

So

x = 9

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