Answer:
x= -9
y=7
z= -7
x= -108
y=
z=
For the rice one:
+ 4 =
- 4 =
4p - 4 = 4(p-1)
4p + 4 = 4 (p + 1)
For nine bags of rice:
I believe it would be 24 people but im not 100% sure
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