posted by please help(: .
1/2x - 1/4y= 7/2
3/4x + 1/3y= 19/2
To change into y=, do i multiply the top one by by 1/4 and the bottom one by -1/3?
You would multiply the top one by -4 and the bottom one by +3, if you want to keep y positive.
What do you have to multiply 1/4 by to get to 1?
1/2 x - 1/4 y = 7/2
Multiply across by 4:
2x - y = 14
y = 2x -14
Now multiply the second one across by 3 to finish it yourself.
Well i can't seem to figure out the intersection on my calc. please help.