Answer:
- could be, isn't necessarily
- G = -3 or 9; X = -9 or 15
Step-by-step explanation:
If E is 3 and EG is 6, then ...
G = E ± EG = 3 ± 6
G = -3 or 9
If E is 3 and EX is 12, then ...
X = E ± EX = 3 ± 12
X = -9, or 15
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If X and G have the same sign, then G will be the midpoint of EX. If not, then G is not the midpoint.
That is, -3 is halfway between -9 and 3, just as +9 is halfway between 3 and +15. On the other hand, -3 is not between 3 and 15; nor is 9 between 3 and -9.
