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September 1, 2015

Homework Help: grade 9 math slope equations

Posted by rany on Thursday, March 19, 2009 at 1:41pm.

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!!!!!

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