Question

Where do the graphs of the following equations intersect: x-y=3
x=-2y-6 please someone who is actually willing to help me i struggle on this

Answer 1

ok. first you need to have one of the equations in terms of x or y.
Lets take x-y=3. solve for x ineedyouubiebs

Answer 2

so it doesnt matter which one i start with?

Answer 3

no, it does not matter. but x-y=3 is easier to work with.

Answer 4

Solve for y,
x-y=3
-x
-y=-x+3
times -1
y=x-3

x=-2y-6
-6

x-6=-2y
divde buy -2

-1/2x+3=y
or
y=-1/2x+3

Answer 5

would it be (-2y-6)-y=3 ?? please correct me if im wrong

Answer 6

@ineedyouubiebs , that would be correct... ^^^

Answer 7

omgggg yesss!!

Answer 8

yes that is correct

Answer 9

@dpaInc and how would i add like terms to that...i mean would i have to distribute?

Answer 10

technically you are distributing a "1" in 1(-2y-6)-y=3
but since it is only a positive 1, just get rid of the parenthesis to get: -2y - 6 - y = 3

now combine like terms and solve....

Answer 11

y=-3

Answer 12

correct...
now solve for x...

Answer 13

and how would i do that?

Answer 14

you have x = -2y - 6 from the beginning....

Answer 15

just plug in the value that you found for y: x = -2(-3) - 6

Answer 16

x=6-6

Answer 17

simplify that....

Answer 18

x=0

Answer 19

you're basically done... and whenever you need to see if your answer is correct or not, plug in the values of both x and y into BOTH equations. if they both turn out to be true statements, your answer is correct.

Answer 20

okay thank you soo much=D can you help me in another problem?

Answer 21

sure.... close this question and post a new one.... :)