-30
A + 9 = 21 A = 21 - 9 A = 12
6x - 9 = 21 6x = 21 + 9 6x = 28 x = 28/6 Reduce to: x = 14/3
21 * 9 = 189
21-9 = 12
Yes, 9 can go into 21, but not evenly. When you divide 21 by 9, the result is 2 with a remainder of 3, meaning 9 fits into 21 two times. Thus, 9 does divide into 21, but it does not result in a whole number.
The factors of 9 are: 1, 3, 9 The factors of 21 are: 1, 3, 7, 21
no 9 + 10 = 19 11 + 10 = 21 9 + 12 = 21
LCD(9, 21) = 63
9 multiplied by 21 is 189.
21
-12 = x+9 x+9 -9 = -12 -9 x = -21
Both 21 and 9 can be divided by 3. 21/3=7 9/3=3 So 21 over 9 can be simplified to 7 over 3.