Math problem 1. Since May this year, some areas in Anhui Province have been hit by heavy rain, and many houses in a county have collapsed. The victims have been urgently transferred and resettled 100

Math problem 1. Since May this year, some areas in Anhui Province have been hit by heavy rain, and many houses in a county have collapsed. The victims have been urgently transferred and resettled 100 people. 1, set up a six-person tent with X roof and a four-person tent with Y roof, and then

x-y=5

6x+4y= 100

Substitute into the solution, x = 12, y = 7.

That is, 12 6-person tents and 7 4-person tents need to be built.

2. Let Party A's speed be Akm/h and Party B's speed be Bkm/h, then

(A+B)*2=42

14A= 14B+42

Substitute the solution to get a = 12 km/h and b = 9 m/h.

That is, the speed of A is 12km/h, and the speed of B is 9 km/h..