Question

how do I solve a three equation problem using elimanation.
-5x+8y+3z=122
7x-2y-12z=-783
-8x-9y-10z=15 ?
I just want to know how to solve step by step -_-

Answer 1

ok look at each problem and think which can be a possible answer for each of these

Answer 2

okay do i work out the first two first , ?

Answer 3

i think we get rib of the y's the second one would have to add up to 8 as the top one ?

Answer 4

do u get it now

Answer 5

kind of but i get a decimal or do i have to get a whole number

Answer 6

depends what the answer is

Answer 7

but u should get a whole

Answer 8

okay for the last two to solve we get rid of y's with an 18 equaling to both ?