Answer:
x=-5
Step-by-step explanation:
4x-7=-27
Add 7 to each side
4x -7+7 = -27+7
4x = -20
Divide by 4
4x/4 = -20/4
x =-5
Answer: Choice A
Ahmed started 6 floors above ground level, then he went down 8 floors
The +6 or simply 6, is positive, so he's on the 6th floor to start. Then adding on -8, which is the same as subtracting 8, moves him down 8 floors.
6 + (-8) = 6 - 8 = -2 indicates he's 2 floors below ground level, so he's in basement level 2 (perhaps some kind of parking garage).
The basic unit of length in the metric system is meter.