Question

Will give a medal to most helpful!!!!!!
Solve the system of equations.
x-4y=5
x=3y-2
(_,_)

Answer 1

First you pick the second equation cause the x is already isolated and place it in first equation in the place of x

Answer 2

ok.......

Answer 3

Then it goes like this:
3y-2-4y=5
Solving this:
-7y=7
Y=-1

Answer 4

2 is the y intercet, right?

Answer 5

Now that you found y you place it in the second equation a and find x
X=3.-1-2
X=6

Answer 6

(6,-1)

Answer 7

ok, so it would be (6,-1)

Answer 8

thank you so much :D

Answer 9

@DonutChip ok, how would you do it then?

Answer 10

I'm pretty sure that's right, but please explain how you would do it and why my resolution is wrong

Answer 11

nevermind lol i did my math wrong .-.

Answer 12

ok lol, I am going to close this question.Thank you do much @Mrs.Allison

Answer 13

That's ok, it is really important to expresse your opinion and point out whenever you feel something is wrong, I'm a teacher and I really liked your attitude. Good job @DonutChip

Answer 14

You are welcome

Answer 15

@Mrs.Allison

your solution IS wrong

3y-2-4y=5 (is correct substitution)

solving gives
-y= 7

y=-7

and substituting back in second equation:
x= 3(-7)-2 = -23

CHECK X BACK IN THE FIRST EQUATION:
-23 - 4(-7)= 5 = correct therefore

(-23,-7) is the solution