3a-4b= = = 2a+2b= = =

3a-4b= = = 2a+2b= = =
3a-4b= = = 2a+2b= = =

3a-4b= = = 2a+2b= = =
这是啥意思?!3a-4b=2a+2b,求a/b?
把2a移向到左边,4b移向到右边,变成
3a-2a=2b+4b;也就是 a=6b,所以a/b=6

这个问题太强大了。
看不明白