500 minus 279 is 221.
500 minus 315 equals 185.
28 minus 27 is 1.
3x squared minus 25x minus 28
64 minus 28 is 36.
28% of 500 = 500 * 28/100 = 140
Half of 7000 is 3500 minus 500=3000.
-10 minus -28 is 18.
Negative 37 minus 28 is -65.
-3 minus -28 is 25
28
8000-500=7500.