Question

Need more help...If 2x-5y=8 and 7x+6y=17, then 9x+y=

Answer 1

from eq 1 x =(8 + 5y)/2
from eq 2 x = (17-6y)/7

Answer 2

Use substitution.
Equation1 2x-5y=8 Solve for x, 2x=8+5y, then x=4+(5/2)y
Equation 2, 7x=6y=17, substitute the newly found x expression like this;
7(4+(5/2)y)+6y=17 this becomes 28+35/2y+6y=17 consolidating similar terms
47y/2=-11 now solve for y

Answer 3

I'm guessing 25

Answer 4

After determing y substitute that value for y int equation 1 and solve for x.
then solve the 3rd equation

Answer 5

You can add the two equations. It works out well

Answer 6

now lokis a superhero too ;)

Answer 7

How?

Answer 8

Who pipped me over?

Answer 9

easy, I fanned you lol

Answer 10

Oh...thank you ;)

Answer 11

been waiting a long time to do that lol ;)

Answer 12

I reciprocated.

Answer 13

I prefer the pink of hero...but not complaining.

Answer 14

i here at500 we get to be villians lol

Answer 15

megamind would be an awesome title ;)

Answer 16

I know others answered this question, but I wrote out a solution while you were doing so, and didn't want to waste it :)

Answer 17

I dunno...I wish they'd turn the fan thing off half the time.

Answer 18

I think it's much easier just to add the two equations, since they sum up to:
9x+y=25

Answer 19

rofl, yes!

Answer 20

tag!!