12-15 = -3
-3 + 15 = +12
3/5 - 3/4 = 12/20 - 15/20 = (12 - 15)/20 = -3/20
3n = 15 + 12 = 27, 27/3 = 9 = n
3, -15
12-15 = -3
-3 + 15 = 12
3/5 = 9/15 and is not equal to 12/15
3 - negative 15 equal too = -12
-3 + 15 = +12
If you multiply 15 by 3 and 12 by 3, you get 45 and 36. So yes, they are equal.
3 , 6 , 9 , 12 , 15
-15
5 3/12 is equal to 5.25 or five and a quarter. Dividing 5.25 by 15 gives 0.35, or 3.5 millimetres.
5 + -8 = 3 + 12 -3 is not equal to 15
3/5 - 3/4 = 12/20 - 15/20 = (12 - 15)/20 = -3/20
3n = 15 + 12 = 27, 27/3 = 9 = n