Question

solve the linear equation
x=13-2y
y=x-8

Answer 1

substitution.
let's solve for y.
y = 13 -2y -8

Answer 2

\[x = 13 - 2(x-8)\]
You can find x, then find y. :D

Answer 3

3y =5
y = 5/3
input that into the equation for x to find your x value.

Answer 4

@SACAPUNTAS
i did it like this
y=13-2(x-8)
y=13-2x+16
y=29+ -2x
y= -14.5
what now? cx

Answer 5

You wrote y but you meant x, right?
Otherwise that doesn't make a lot of sense.
I am with you up to:
\[x = 29 - 2x\]But then since it's x you end up with:
\[x = \frac{29}{3}\]

Answer 6

@SACAPUNTAS yeah, my bad
why do you end up with 3 and not 2?

Answer 7

Because you have to add 2x to both sides to get rid of the -2x.
\[x = 29 - 2x\]\[x + 2x = 29 - 2x + 2x\]\[3x = 29\]

Answer 8

is there an easier way to do that? like i thought you just had to divide it

Answer 9

There might be an easier way but I don't know it. :D

Answer 10

oh okay cx lol thank you so much!