Please show us your work, even if you think it is wrong - so that we know where to begin to help you.foothillstudent_12 said:y = 3x + 6
y= x -18
this problem seems impossible to answer every time i did it i came out with different answers
a.no solution
b.(-12,-30)
c.(-3,-21)
infinitely many solutions
foothillstudent_12 said:well i thought that it would be solved with the substitution system so i did this:
y = 3x +6
y=x-18
x-18(3x + 6)<<<< How is that !!! Where did the "=" sign go??
18(4x + 6)<<<< How is that !!! Where did the "=" sign go??
72x + 108<<<< How is that !!! Where did the "=" sign go??
x = 1.5<<<< How is that !!! How did the "=" sign re-appear??
Do the problem carefully...
foothillstudent_12 said:sorry my mistake
x-18=3x + 6
x-18-x= 3x + 6 - x
-18 = 2x + 6
-18 - 6 = 2x
-24 = 2x
and continue....
foothillstudent_12 said:y=x-18
y=6-18
y = 12
so does that mean that the coordination is (6,12)
No...
Did you check whether those number satisfy the given equations?
They don't.
How did you get x = 6 --- didn't you notice my corrections to your work???