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Ozella Dooley

Lvl 10
3y ago
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Wiki User

14y ago

x is called a variable. It is an unknown quantity that is to be solved for.

16-X = 9

add X to both sides

16 = 9 + X

subtract 9 from both sides

7 = X

( of course you can just look at this problem and see what X is )

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Q: What does x stand for 16-x equals 9?
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