bantu dong...terserah mau pake cara atau enggak

1. X-Y = -5-2 = -7
2. a+6 = -14
a = -14-6
a = -20
4. -5-(-2+4)
-5-(2)
-7
5. 10X(25:5)+(-5)
10X(5)+(-5)
50-5
45
6. -10+(-8)-(-1)
-10-8+1
-18+1
-17