279 is the sum of four numbers of a, B, C and D. if a is reduced by 2, B is increased by 2, C is divided by 2, D is multiplied by 2, then all four numbers are equal, then a is a______ B is______ (c) yes______ Yes, Ding______ ．

279 is the sum of four numbers of a, B, C and D. if a is reduced by 2, B is increased by 2, C is divided by 2, D is multiplied by 2, then all four numbers are equal, then a is a______ B is______ (c) yes______ Yes, Ding______ ．

Let every subsequent number be X. from the meaning of the question, we can get x + 2 + X-2 + 2x + 12x = 279 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 412x = 279 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 62; number A: 62 + 2 = 64

The sum of the four numbers a, B, C and D is 100. Add 4 to the number a, subtract 4 from the number B, multiply the number C by 4, and divide the number d by 4. The four numbers are exactly equal. Find the four numbers

If four numbers are equal after changing, then a is x-4, B is x + 4, C is x △ 4, D is 4x. According to the meaning of the question, we can get the equation: x-4 + X + 4 + X △ 4 + 4x = 100 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 254x = 100 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; If x = 16, then a: 16-4 = 12 b: 16 + 4 = 20 C: 16 △ 4 = 4 D: 16 × 4 = 64 A: the four numbers of a, B, C and D are 12, 20, 4 and 64 respectively