590871
2725594
2012190
605079
5451188
4024380
22975516
27991016
5028966
10175029
2 = b(2/b)
(-8)^-1*x=(20)^-1
(-8)^-1*x=(20)-1
by what number should (-8)^-1 be multiplied to get (20)^-1?
(a)3
(3/4)² - (1/2)² + 1/2
28xy - 16 b + x y - b
