You can assume that your brother's original money was X and your brother's original money was Y, so after your brother gave it to your brother 84 yuan, he left x-84, and your brother's current money is y+84. However, because the elder brother gave money to the younger brother, the younger brother actually has more 36 yuan than the elder brother, and the following equation can be obtained: y+8-(x-84)=36.

X-y= 122, so my brother is more than my brother 122 yuan.