you subtraced the equations wrong.
You should have gotten
6x-12y=15------(3) (3)-(4)
6x+16y=8-------(4)
____________________
-28y = 7
which leads to y=-1/4
question: slove by comparison and check your solution?
a)2x-4y-5=0
3x+8y-4=0
my work so far:
2x-4y=5-------(1)
3x+8y=4-------(2)
_____________
6x-12y=15------(3) (3)-(4)
6x+16y=8-------(4)
____________________
28y/28 = 7/28
y= .25
2x-4(.25)=5
2x-1+5
2x/2 + 6/2
x = 3
ya i was wrong when i did my check, both sides werent equal, and i cant figure out why i was wrong in my work.PLEASE HELP!!!!!
4 answers
but i divided both sides by -28 though
i did that and i got the same thing as before though?
cool .....not
1 answer