Answer:
Step-by-step explanation:
We move all terms to the left:
15/9-(25/9x)=0
Domain of the equation: 9x)!=0
x!=0/1
x!=0
x∈R
We add all the numbers together, and all the variables
-(+25/9x)+15/9=0
We get rid of parentheses
-25/9x+15/9=0
We calculate fractions
=0
x=0/1
x=0
i hope helps you and if you want you can give me a brainly crown only if you want
The reason fractions need a common denominator before adding or subtracting is so that the numbers of pieces you are adding/subtracting are all the same size. Note that the numerator of a fraction just tells you how many pieces you have of that size.
Answer:
Step-by-step explanation:
This is an inverse proportion.
men = k / Time So first we need to find k
k = men * Time Substitute values
k = 15*80
k = 1200 Notice the units are man days.
Now what happens if we increase the number of men to 20? What happens to the number of days.
20 = 1200 / time Multiply both sides by time
20*time = 1200 Now divide by 20
time = 1200/20
Answer: time = 60 days