12 plus 9 equals 21.
21
A + 9 = 21 A = 21 - 9 A = 12
depends what 'a' =
x + 21 = 36Subtract 21 from each side:x = 15
12 plus 9 equals 21.
21 + 15 = 36
15+6 is 21. 13 + what is 21? 21 - 13 is 8 Eight
21
13 + 21 - 7 + 12 = 15
A + 9 = 21 A = 21 - 9 A = 12
It equals 70
661
depends what 'a' =
73
x + 21 = 36Subtract 21 from each side:x = 15
Y=-6