The correct answer is the second choice
2x = 8 so x = 8/2 = 4
or
3x = 12
x = 12/3
x = 4
answer: x = 4 (answer is your last choice)
The answer is 47.85 because you're just multiplying the percentage to the given number, but first, convert the percentage into a decimal.
-3i+3/4+2i-9/3-3i=(3/4-9/3) +(-3i+2i-3i)=(3/4-3)+(-4i)=(3/4-12/4)-4i=
=-9/4-4i
(A) is the correct answer choice:)