数学题~2道``要过程``

1.已知方程组5x+y=3和ax+5y=2 与 x-2y=5和5x+by=3有相同的解`求a和b

2.若|m+n-5|+(2m+3n-15)平方=0 求m和n

---

5x+y=3
x-2y=5
解得吵物销:x=1,y=-2
ax+5y=2 ==> a=12
5x+by=3 ==> b=1

m+n-5=0
2m+3n-15=0
解蚂胡得升游:m=0,n=5

---