早教吧 育儿知识 作业答案 考试题库 百科 知识分享

100(X-2)+10X+2X=100*2X+10X+X-2-495

题目详情
100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495
▼优质解答
答案和解析
100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495
100X-200+10X+2X=200X+10X+ X - 2 - 495
100X+10X+2X-200X-10X-X=- 2 - 495+200
-77X=-297
X=77/297