1题:x={x:-5≤x≤2,x属于整数集},y={y:-5≤y≤2,y属于整数集,且x≠y}
3题:
1.a=0,b=0
2.a=10,b=4
Explaination:
from a+2b = 3a-3b ,know2a=5b
first you can give a value to "a",then you will obtain the only value of "b" by the formula 2a=5b.