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Anonymous
x ≠11
9 + x = 21
9 + x - 9 = 21 - 9
x = 12
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X=5Y= 92x + 11= ?2(5)+11=?10+11= 21
12 plus 9 equals 21.
11 plus 5-10 plus 20-9 plus 14-10 is equal to 21
A + 9 = 21 A = 21 - 9 A = 12
If: x+9+5x = 21+2x Then: x = 3