Question

PLEASE HELP ME!! Medal and Fanning!

For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation?

3x + y = 8
-x - 2y = -10

Answer 1

2y + 10

2y + 10

2y - 10

-2y - 10

Answer 2

After you have solved for "x" you would plug in what you have solved for into the other equation in the x's. I don't know if that makes sense

2x + y = 4
3x + 2y = 4


2x + y = 4
-y -y

2x = -y + 4
/2 /2 /2

x = -(y/2) + 2

now plug that into 3x + 2y = 4

3(-(y/2) + 2) + 2y = 4 and then you would just solve.

Answer 3

So would it be -2y+10?

Answer 4

IF you isolated x in the equation: -x - 2y = -10

You would get; -x - 2y = -10
+2y +2y

-x = 2y - 10
/-1 /-1 /-1

x = -2y + 10

Now plug in that \(\ -2y + 10 \) into 3x + y = 8

and to do that, simply plug in \(\ \color{green}{-2y + 10}\) into \(\ 3(\color{green}{???}) + y = 8 \)

Answer 5

Thanks soo much @tHe_FiZiCx99 !!!! =^.^=

Answer 6

You're welcome :P

Answer 7

:)

Answer 8

so what was the answer featheres