Answer:
x=-20
Step-by-step explanation:
x+9=-11
Subtract 9 from both sides. (-11-9=-20)
x=-20
X=9
3x-12=x+6
2x-12=6
2x=18
X=9
Add 21 to both sides, then that means you get
K>22
there is no need to change the signs, as you are not multiplying by a negative or anything
