Question

For a metal? :)




Use the Substitution Method to solve the following system of equations.
2x - 9y = 1
x - 4y = 1

(1, 5)

(-5, -1)

(5, 1)

(-5, 1)

Answer 1

I think its 1,5 but im not sure

Answer 2

Not quite.
Which MeTal btw ? :')
In the second equation!
x = 1+4y [Now SUBSTITUTE this x value in the in the first equation]
Like this! [ 2(1+4y) - 9y = 1 ] ---> Solve now! :D
Understood? :)

Answer 3

O.o i'm confused :P

Answer 4

We need to SUBSTITUTE OVER HERE RIGHT?
So we find any variables' value in terms of the other variable like we found x = 1+4y [In terms of y]
So we SUBSTITUTE this value in the fiirst equation!
2(1+4y) - 9y = 1
2+8y-9y = 1
y=1 [Now SUBSTITUTE this value in any equation to FIND X]
Let's put it in the second equation
x = 1+4y = 1+4(1) = 5
So solution
(x,y) = (5,1)
Understood? :)

Answer 5

So i was right though 5,1 is the answer?

Answer 6

You said 1,5 buddy!
Good job though! :)
There is a goldmine of difference between (5,1) and (1,5) btw! :)

Answer 7

Oh my mistake :P LOL Thanks sooo much!

Answer 8

would you like another metal? I have another question