Answer:
A. 11.4
Step-by-step explanation:

Data:
P = 7
r = 0.07
Calculation:

X-3=-6
if you take away 3 from a number, you will get -6
x=-3
Answer:
The image has the ans.
Step-by-step explanation:
Image explains.
250-3m
m represents months
Not an equation but an expression since I don’t know the number of months he was on the diet.
So you know the whole line is XZ which is 83.Then you find out it is in two parts so that is XY and YZ which are 11 and 4c. You can make the equation:
11+4c=83
4c=72
c=18
c=18 and YZ=72