Answer:−x2−6xy+8y2+9yz−12
Answer:
y = -2x + 5
Х-y= 9
2x + y = 4
y = 5
lmk if incorrect, please give brainliest
192
i did that test before
No.
It's not smaller either.
0.5 is exactly equal to 9/18 .
Both of them are different ways to write "one half".
Answer:

Step-by-step explanation:
n is doubled: 2n
y added: 2n + y
divided by 2: n + 
n subtracted -> final resutl: 