9
16/21 minus two equals -1 5/21
b + 9 = 21 Take the + 9 across the other side of the equals sign. a plus becomes a minus. b = 21 - 9 so... b = 12. This can be checked by setting b to 12 in the first equation b + 9 = 21 12 + 9 = 21 which is correct.
6
p = 5
48
minus 21 think of it as 12+9 which equals 21 then just whack a minus sign infront
16/21 minus two equals -1 5/21
b + 9 = 21 Take the + 9 across the other side of the equals sign. a plus becomes a minus. b = 21 - 9 so... b = 12. This can be checked by setting b to 12 in the first equation b + 9 = 21 12 + 9 = 21 which is correct.
12.
8
3x - 12 = 10x - 15 - 6x -10 3x - 12 = 4x -25 3x + 13 = 4x 13 = 4x - 3x 13 = x None?
6
p = 5
48
I'll do ya one better - 12 plus 8 equals what?
21
21-3=17 cause in 21 the 1 becomes a 10 and and the 2 becomes a 1 so 10 minus 3 equals 7 and 1 minus 0 equals 1 so the answer is 17