Explanation:
1. x+4 =9
x= -4 -9
= -13
2. x-2 =10
x = 2 + 10
x= 12
3. x-9 = -3
x= 9 -3
x=6
4. x +5 = 10
x= -5 -10
x= -15
5. x-6 =13
x = 6 -13
x = -13
6. y-4 = 28
y = 4 +28
y= 32
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