Verified answer

(4,(6)+5,5)*5 = (42/9 + 55/10)*5 = (420 + 495)/90 * 5 = 915/90 * 5 = 305/6

4.(6) = x

10x = 46.(6)

10x - x = 46.(6) - 4.(6)

9x = 42

x = 42/9