28=1*2*2*7
28=2*14,-2*-14
28=4*7, -4*-7
28=1*24, -1*-24
30. 28 x 30 = 840
How about 28 times 10 = 280 as one example
128
n = 35
It Equals 28. If You Do 7x4 It Will Say 28.
40-n equals 28 = 12
112
28 = 1 x 28, 2 x 14, 4 x 7.
7x4 equals 28.
28
3x + 7 = -4x + 28 implies 7x + 7 = 28
28 multiplied by 30 equals 840.