Well, if you notice, is just an arithmetic sequence, is adding 2 to get the next term.
so the last term is 21, so the one before that has to be 21-2 or 19, and the one before that 17 and the one before that 15.
15+17+19+21.
25 - 3u = 2u
You need to get the variable, u, on one side of the equation. You can do this by adding 3u to both sides.
25 = 5u
Now you want to get u by itself, divide 5 off of both sides to find u.
5 = u
It would be 4
so x=4
because 18 and 6 are the bases and 6 goes into 18 3 times. so what goes into 12 3 times, 4.
Answer:
Step-by-step explanation:
