Lingling's family is going to decorate the new house. If Party A and Party B cooperate with two decoration companies, it will take 6 weeks to complete, and the decoration cost is 52,000 yuan.

Solution: (1) Assuming that it takes X weeks for company A to do it alone and Y weeks for company B to do it alone, the equation can be listed.

{ 6/x+6/y = 1 4/x+9/y = 1，

The solution is {x =10y =15;

∵ 10< 15,

It can be seen that Company A needs less time, so in terms of time, we choose Company A..

(2) Assuming that the weekly expense of Company A is 10000 yuan and that of Company B is 10000 yuan, the equation {6a+6b=5 4a+9b=4.8 can be listed.

The solution is {a = 3/5b = 4/15;

∴ We can get that Company A needs 3/5×10 = 305 = 60,000 yuan, and Company B needs 4/15 = 40,000 yuan, and 40,000 yuan < 60,000 yuan.

Choose company B from the perspective of saving money.