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12 + x = ? if x = 9 evaluate this expression

2 Answers

4 votes
If x = 9 you can replace the x in 12 + x with 9.

12 + x = ?
12 + 9 = ?

12 + 9 = 21
User Andrew Horn
by
6.2k points
1 vote
12 + x(9) = ?
12 + 9 = 21
User Chris Paton
by
6.2k points
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