2x+2=6
2x=4
x=2
Hope this helps :)
Alright, so 3f-g=4 and f+2g=5.
3f-g=4
f+2g=5
Multiplying the first equation by 2 and adding it to the second, we get 7f=13 and by dividing both sides by 7 we get f=13/7. Since f+2g=5, then we can plug 13/7 in for f to get 13/7+2g=5. Next, we subtract 13/7 from both sides to get 2g=3+1/7=22/7 (since 3*7=21 and 21+1=22). DIviding both sides by 2, we get 22/14=g. Plugging that into f/39g, we get (13/7)/(22*39/14)
= (13/7)/(858/14)
= (13/7)*(14/858)
=182/6006
= 91/3003 (by dividing both numbers by 2)
= 13/429 (by dividing both numbers by 7)
= 1/33 (by dividing both numbers by 13)
8 because all elements after nitrogen have not only two energy levels, they also find it easier to just get rid of electrons than to absorb electrons to get to 8 electrons.
Answer:
Bob has one more marble than Kayla.
Step-by-step explanation:
The complete question in the attached figure
Let
x -----> the number of marbles Bob has
y ----> the number of marbles Kayla has
we have

we know that
To find out how many more marbles Bob has than Kayla, subtract the number of marbles Kayla has from the number of marbles Bob has

Substitute the given values

therefore
Bob has one more marble than Kayla.