Question

Need help!



Solve the system using substitution method

c(n)=-3n-6
c(n)=n-4

Answer 1

n=-2

Answer 2

?

Answer 3

oh no sry!

Answer 4

from the second equation
n=c+4
substitute c+4 in n in the first equation
c=-3(c+4)-6
solve for c

then what u get for c u substitute it in any of the equations to find n

Answer 5

hw is n=c+4?

Answer 6

is that n*c?

Answer 7

no its not, its c(n) like f(x)
i guess

Answer 8

i know that wht i thought...but hw is n=c+4?

Answer 9

c is the same as c(n)

Answer 10

When you move the negative to the other side, its positive.

Answer 11

oh ok i didnt know that c is the same as c(n)

Answer 12

or u can just subsitute c=n-4
and find n
then find c

Answer 13

oh so i got c=-4.5

Answer 14

so n=8.5

Answer 15

n=-0.5

Answer 16

c(n)=-3n-6
c(n)=n-4

is this a elementary math?

suppose c(n) = y and n = x, then the equation will be :
y=-3x-6 ...(1)
y=x-4...(2)
arranging x from the equation (1) to the left side :
y+3x=-6 ...(1)
y=x-4 ... (2)

subtitute y from (2) to (1) :

(x-4) +3x = -6
solve this :

4x-4=-6
4x=-2
x= - .5

to get the value of y, subtitue this x to equation (2) :
y=x-4
y=(-.5)-4
y=-4.5

that's it!

the solution is
y=-4.5
and
x==.5
or

c(n)=-4,5 and n=-.5

Answer 17

that's Equations Not system function.....

Answer 18

囧~