括号拆开:4/3X-28/3-3X-4/5X-12/5=-29
乘以最小公倍数15: 20x-140-45x-12x-36=-435
(20-45-12)X=-435+140+36
-37X=-259
X=7
遇到括号就多空几行 ,题目看不懂