商店有黄气球17个，红气球比黄气球少9个，花气球的个数是红气球的3倍。花气球有多少个？:t1r2?'J5C8G;r8h1@0@
算式：提示+m'N6\*\/C*a:t1r2?'J5C8G;r8h1@0@
答：花气球有2B'n6s*h:h;`8P2\个。:t1r2?'J5C8G;r8h1@0@