0． The two brothers each save a sum of money. It is known that the younger brother has 84 yuan. If the older brother gives the younger brother 6.5 yuan, the two brothers have the same amount of money. How much money did my brother save? (solution by equation)
0．兄弟俩各存有一笔钱，已知弟弟有84元，如果哥哥给弟弟6.5元后，兄弟俩拥有的钱数一样多．哥哥原来存有多少钱？(用方程解)
<gadget id="calculator">84 + 6.5</gadget>
<output>90.5</output>

<gadget id="calculator">90.5 + 6.5</gadget>
<output>97</output>

<result>97</result>