Question

Solve by any appropriate method (substitution or elimination)
12x+y=465
12y+x=146

@Loser66
@e.mccormick

Answer 1

I prefer substitute. try, please

Answer 2

I too..

Answer 3

help her, please @waterineyes

Answer 4

ok. I understand this one a little better, but the only difference with this one than the ones I've gotten use to is the position of y and x in each equation.

Answer 5

Here find y from first equation:

you will get :

\(12x + y = 465\)
Now subtract 12x from both the sides:

\(y = 465 - 12x\)..

Answer 6

Now this value you will use in second equation in place of y, and solve that you will get x..

Answer 7

so the second equation will look like;
12(465-12x)+x=146?

Answer 8

5580-144x+x=146
5580-143x=146
143x=38.219\[\approx38.22\]

Answer 9

Wait..

First two steps are right, what you have done in third??

Answer 10

\(5580 - 143x = 146\)

Here subtract 146 from both sides first and tell me what will you get?

Answer 11

the 143 isn't supposed to be there. It's supposed to be x=38.219 but round it to 38.22

Answer 12

143x is right, but firstly subtract 146 from both the sides..

Answer 13

but that wouldn't leave me anything to find x

Answer 14

See the step goes like this:

\[5580 - 143x = 146\]

Subtract here 146:

\[5580 - 143x - 146 = 146 - 146\]
\[5434 - 143x = 0\]

Now add 143x both the sides:

\[5434 - 143x + 143x = 0 + 143x\]
\[5434 = 143x \; \; Or \; \; 143x = 5434\]

Now divide it by 143 and fine x.

Answer 15

oh. ok. That gives me 38

Answer 16

Yep.

Now find y by using \(y = 465 - 12x\)

Answer 17

You will get a number starting from "N" when said in English language..

And you are done I think.. :)

Answer 18

I'm so confused now
I thought I understood this to a decent point but now I'm back to square one and don't understand it at all

Answer 19

Where are you not getting??

You have got x, no??

Answer 20

it's going to the second equation now to get y.

Answer 21

See by plugging in value of x in any equation either first or second, you can find y..

Answer 22

In any one of the equation, put x = 38, and find y..

Answer 23

\[y=465-12*38\]\[y=465-456\]\[y=9\]\[x=38 y=9\] @waterineyes

Answer 24

Yep..

Good..

Answer 25

ok. Thank you

Answer 26

The thing that matters is not this that you got right answer but have you got all the steps, how we do it..
Confirm it..

You are welcome dear..

Answer 27

I do understand. I had to go back and relook at it. I missed writing down a couple things and that is what was frustrating me as far as not understanding. Thank you

Answer 28

Okay, keep it up..

If still in problem, then let me know..

Answer 29

I got that one. I have another one that deals with graphing and I understand how to do slope but I need a refresher on it