Answer:
14.5 kg
Step-by-step explanation:
Arrange the numbers in increasing order, which will give
8kg, 8kg, 14kg, 15kg, 17kg, 19kg
You then find the middle number(s), which is [14kg & 15kg] in this case.
Then you add the middle numbers and divide by 2, hence

Yes it is. If you see any zero after the last number after a decimal point and then compare the same numbers but without the zero they are equivalent.
It would help if there was a diagram
Move all terms to the left side and set equal to zero. Then set each factor equal to zero. Exact form:
X=0,1/5
Decimal form:
X=0,0.2