X=5Y= 92x + 11= ?2(5)+11=?10+11= 21
11 plus 5-10 plus 20-9 plus 14-10 is equal to 21
12 plus 9 equals 21.
A + 9 = 21 A = 21 - 9 A = 12
If: x+9+5x = 21+2x Then: x = 3
This is not correct. If x=11, then 9+x=20. In order for 9+x=21 to be correct, x would have to be equal to 12.
X=5Y= 92x + 11= ?2(5)+11=?10+11= 21
11 plus 5-10 plus 20-9 plus 14-10 is equal to 21
12 plus 9 equals 21.
A + 9 = 21 A = 21 - 9 A = 12
11 + 7 + 9 = 27
21
21
If: x+9+5x = 21+2x Then: x = 3
No you can not prove that 9 +10 = 21.
21
No, because 9+10 = 19