The sum of two natural numbers is 9858. The larger number is equal to the smaller number after removing the single digits. What are the two numbers? One more question: in the sixth grade group, the number of boys accounted for 4 / 9 of the total number of the group. Later, seven boys were transferred in. At this time, the number of boys was just 3 / 5 of the total number of the group? Please, I'm stupid. I have a lot of questions to ask you. Can I help you? Thank you! Another question: there are 120 ball, divided into two classes, class 1 to 3 / 1 and class 2 to 2 / 1 equal, ask two classes each to several ball?

896 and 8962 let X be smaller than x, and Y x + y = 985810x + B = y (B is taken between 0 and 9) 10x + X + B = 98589858 divided by 11 equals 896, more than 2x = 896, B = 2Y = 8962x boys and y girls, X / (x + y) = 4 / 9x + 7 / x + y + 7 = 3 / 5. The solution is x = 8, y = 10, class one, class two, y3x = 2yx + y = 120

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