You can set y = to each side of the equation, then multiply by the denominator and put into standard form.
Left side:
.. y = 1/4x -3
.. 4y = x -12 . . . . multiply by 4
.. 4y -x = -12 . . . subtract x
Right side:
.. y = 1/2x +8
.. 2y = x +16 . . . multiply by 2
.. 2y -x = 16 . . . subtract x
These equations correspond to selection B.
Answer:
40x- 24y
Step-by-step explanation:

Let

denote the

th partial sum of the series, i.e.

Then

and subtracting from

we get


As

, the exponential term vanishes, leaving us with

and so
Answer:
20b^2
Step-by-step explanation: