Question 1137135

1. 
{{{y=-2x+1}}}
{{{y=x-5}}}
---------------------------rewrite in standard form
{{{2x+y=1}}}
{{{-x+y=-5}}}

*[invoke solve_by_graphing 2, 1, 1, -1, 1, -5]



2.

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


3. 
{{{y=2x}}}
{{{x+y=3}}}
-----------
{{{-2x+y=0}}}
{{{x+y=3}}}

*[invoke solve_by_graphing -2, 1, 0, 1, 1, 3]



4.
{{{ x+y=0}}}
{{{3x+y=-4}}}
------------------

*[invoke solve_by_graphing 1, 1, 0, 3, 1, -4]


5. 
{{{x=3-3y}}}
{{{x+3y=-6}}}
---------------------
{{{x+3y=3}}}
{{{x+3y=-6}}}

*[invoke solve_by_graphing 1, 3, 3, 1, 3, -6]


6. 
{{{x+2y=-4}}}
{{{4y=3x+12}}}
-------------------
{{{x+2y=-4}}}
{{{-3x+4y=12}}}


*[invoke solve_by_graphing 1, 2, -4, -3, 4, 12]



7. 

{{{y=-2 }}}
{{{2x-5=20}}}
---------------
{{{y=-2 }}}
{{{2x=25}}}
----------------
{{{y=-2 }}}->horizontal line
{{{x=12.5}}}->vertical line


{{{ drawing ( 600, 600, -15, 15, -15, 15,
line(12.5,15,12.5,-15),
graph( 600, 600, -15, 15, -15, 15, -2)) }}}

intersection point: ({{{12.5}}},{{{-2}}})


9. 
{{{4x+3y=-15}}}
{{{y=x+2}}}
------------------

{{{4x+3y=-15}}}
{{{-x+y=2}}}


*[invoke solve_by_graphing 4, 3, -15, -1, 1, 2]