Answer:

Step-by-step explanation:
Let's find a particular solution. We need a function of the form
such that
and


then, 3a= 8, 2b+6a =0 and c+2b = 0. With the first equation we obtain
a = 8/3 and replacing in the second equation 2b+6(8/3) = 2b + 16 = 0. Then, b = -8. Finally, c = -2(-8) = 16.
So, our particular solution is
.
Now, let's find the solution
of the homogeneus equation
with the method of constants coefficients. Let 


then 



and
.
So,
and the solution is
.
He spend: 1440*2.5=3600
he earn: 0.25*1440*12=4320
[because he sells 0.25/each and buy 1440 dozen so 1440*12]
4320-3600=720
You would take 6.4% into 1640000 and you would pay that the next 30 years
5x + 9 = x - 23
move x to the other side
sign changes from +x to -x
5x-x+9= x-x-23 ( combine like terms)
5x-x+9= -23
4x+9= -23
move -9 to the other side
4x+9-9= -23-9
4x= -23-9
4x= -32
divide both sides by 4 to get x by itself
4x/4= -32/4
answer:
x= -8
Answer:
100
Step-by-step explanation: