... Substitute 3 for x and solve for y:y = –( 3) 3 + 3( 3) – 3 y = –(–27) – 9 – 3 y = 27 – 12y = 15ᎏ5245ᎏᎏ66 – ᎏ9265ᎏᎏ6– PRACTICE TEST 3 –240 13. c. There are ten coins in the bank ... for xand 5 for y: (3 xy+ x)ᎏxyᎏ=( (3) (2)(5) + 2)ᎏ25ᎏ= (30 + 2)ᎏ25ᎏ= 32 ᎏ25ᎏ= (͙5 32 ෆ)2=22= 4. Or, 3( 2)(5) = 30 , 30 + 2 = 32 , the 5th root of 32 is 2, 2 raised to ... 212 3 456789•12 3 4567890•/12 3 4567890•/12 3 4567890•12 3 456789•12 3 4567890•/12 3 4567890•/12 3 4567890•12 3 456789•12 3 4567890•/12 3 4567890•/12 3 4567890•12 3 456789•12 3 4567890•/12 3 4567890•/12 3 4567890•9....