Question

y=3x-1
y=2x+8
solve for y and x

Answer 1

First step, take y=3x-1 and plug it into the other one and then solve for x

Answer 2

how do i do that?

Answer 3

sorry, im pretty dumb in math :$

Answer 4

Plug it in, substitute the bottom equation becomes 3x-1=2x+8, then solve for x

Answer 5

-2x+3x=8+1
x=9
is that right?

Answer 6

and to find y all you do is just sub x back into any of the equations
3(9)-1 = y
y=26

Answer 7

Good job, you now know x. Now plug it in the next one and find y

Answer 8

-2y+5y=8-2
3y=6
y=2
is that right?

Answer 9

where did you get -2y+5y from?

Answer 10

thats just another equation

Answer 11

oh so different from the previous one?

Answer 12

yes

Answer 13

ohhh okk yep that's correct then! =]
so do you understand how to do it now?

Answer 14

yeah ! thanks lol =)

Answer 15

no worries