Terry, kevin and barry together have 215 marbles. terry has 20 marbles more than barry and kevin has 10 marbles more than terry. how many does barry have?

Terry, Kevin and Barry have a total of 215 marbles.=> Terry has 20 marbles more than Barry = x + 20=> Kevin has 10 marbles more than Terry = (x + 20) + 10=> Barry = xSolutions:=> x + x + 20 + x + 20 + 10 = 215=> 3x + 50 = 215=> 3x = 215 - 50=> 3x = 165=> 3x / 3 = 165 / 3=> x = 55Barry have = 55Terry = 55 + 20 = 75Kevin => 75 + 10 = 85

100 because 40 plus 40 is 80 and 80 subtracted by 180 is 100 so your answer is 100.