1.a+6=9 2.7y-4=5y+2 3.X + 8= 15 4.X + 5 =-12 5.X + 16 = 7 Tolong bantu jawab dengan cara terima kasih

1. a=9-6.
a=3
2. 7y-5y =2+4
2y =6
y = 3
3. X = 15-8
X = 7
4. X = -12-5
X = -17
5. X = 7-16
X = -9