It is known that: 10 () 3 = 28 8 () 7 = 4 3 / 4 () 1 / 4 = 2 find the law according to these formulas, 5 / 8 () x, X=

It is known that: 10 () 3 = 28 8 () 7 = 4 3 / 4 () 1 / 4 = 2 find the law according to these formulas, 5 / 8 () x, X=

a()b=4*(a-b)