Question

substitution method for this proble, please help
7a=4-b
7a=6-b

Answer 1

if 7a = 4-b
and 7a =6-b
7a =7a
4-b = 6-b.. can u do it from here?

Answer 2

2-b

Answer 3

if that is not hte answer than no I cant this subject is not my best one

Answer 4

hmm can u make sure the question again.. bcos if thats ur question b is cancelling out with is ntt possible.

Answer 5

what is the substitution method ?

Answer 6

@nubeer ATTENTION !!!

Answer 7

I have the slightest idea please advise

Answer 8

its a method in which we replace a variable with different expression.

Answer 9

wondering if you guys could take me step by step on the last 14 question that I have for a final

Answer 10

that is what I thought I was taking away the 7a and I was doing it like 6-4 but nothing is coming out right

Answer 11

yes @nubeer is right so calcule for example the x variable from the first equation and this replace in the second

can you make this step by step for right,correct understanding of asker here now ?

Answer 12

jhonyy9 could you help me out step by step not give me the answer but walk me through these last questions if possible

Answer 13

?? that did not make since to me

Answer 14

@bigmommatiad can you make sure agian that the question is written right because for your question the values are not coming..

Answer 15

are you saying there is no solution tbecause that could be an answer

Answer 16

that is the questions

Answer 17

but i can tell u in general what is subsitution method.
7a = 4-b
b = 4-7a
in this step i have to make a or b the subject i have made b the subject..
now replace the "b" i found in other equation
7a = 6- (4-7a)
the rest is arithmetic in this case "a" is cacelling out so i think no solution,.

Answer 18

k dont leave have another question

Answer 19

ok so I have x=7-y

x y
0 ?
6 ?
7 ?

Answer 20

hmm i see .. well why don't u try for me first.. write steps here if u do soemthign wrong i will correct u.. what u say?

Answer 21

sounds good

so for the first one would I do 7-0, then 7-6, then 7-7

Answer 22

yup.. there u go.. u did it :)

Answer 23

omg wow k hold on please

Answer 24

the number of state and federal inmates in millions during year x, were x>2002 can be approx by following formula
n=0.05x-98.65
determine year in which there were 1.5 million inmates

Answer 25

i am completely lost on this one

Answer 26

nubeer you still here

Answer 27

hmm yes i am.. well look u have to find x.. so u have to rearrage your expression and make x the subject.
n +98.65 =0.05x
now divide both sides by 0.05 so u can get x as a subject.. do u get till this part?

Answer 28

so 1973

Answer 29

no that cant be right

Answer 30

b=4-7a
substitute this value in second equation
7a=6-(4-7a)
7a=6-4+7a
0=-2
thus not possible and hence no solution

Answer 31

hmm no..
(n+98.65)/0.05 =x do u get it now?

Answer 32

we are doing a different problen hr it is
the number of state and federal inmates in millions during year x, were x>2002 can be approx by following formula
n=0.05x-98.65
determine year in which there were 1.5 million inmates 6 minutes ago

Answer 33

a little but I do not know what n is

Answer 34

n=1.5.. as it already says n would be in millions..