Answer:
ok so basically, graph -4 and make a line going left.
Step-by-step explanation:
-10 -9 . -8 . -7 . -6 . -5 . -4
<---------------------------------o----->
Do it like that if you can
0.04 kilometers
D
The Answer is D
3x-6=12
3x-6=-12
x=6
x= -2
1st x = -2
2nd x = 6
7 marbles
Let the number of marbles he had be x
ie. X + 2X =21
3X=21
X=21/3=7
