what is the solution to the following system? -3x-2y=-12 9x+6y=-9 choices A.(2,1) B.no solution C.(-2,-1) D.infinitely many solutions

Question

what is the solution to the following system? -3x-2y=-12   9x+6y=-9  choices A.(2,1) B.no solution C.(-2,-1)  D.infinitely many solutions

zpupster · Answer

go ahead kadin use what learned earlier, pick substitution or elimination

anonymous · Answer

pick eihter one?

zpupster · Answer

sure they both work it just asks for a solution

anonymous · Answer

okay ill go with elimination

zpupster · Answer

good choice

zpupster · Answer

what can you mult the first eqaution by to get rid of x

anonymous · Answer

by six right? because that would give me 18 and 9 times 2 is 18?

zpupster · Answer

-3x   -    2y   =     -12   
  9x    +  6y   =       -9

zpupster · Answer

i was thinking 3  that would give -9 and 9 when added they cancel

anonymous · Answer

okay that makes more sense

anonymous · Answer

-9x  -   2y    =    -12
9x     +  6y   =   -9

zpupster · Answer

no you have to mult every term by 3 also -2y and -12

anonymous · Answer

oh so -9x-6y=36

zpupster · Answer

yes now add the equations together

anonymous · Answer

do i do it by like terms?

zpupster · Answer

yes

anonymous · Answer

0x  0y  =  27

zpupster · Answer

yes it is safe to say no solutions can be found

anonymous · Answer

okay im starting to understand these much better would you like to help me with another one just to be sure?

zpupster · Answer

sorry lunch time, you can  message i may be bck later today.

remember to do your checks if the checks do not work you did something wrong.

anonymous · Answer

alright thanks!!