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?
4
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.
thank yall(:
Well i can't seem to figure out the intersection on my calc. please help.
To change both equations into the form "y =", you can multiply the top equation by (1/4) and the bottom equation by (-1/3). Let's go step by step:
1/2x - 1/4y = 7/2
Multiplying both sides of the equation by 1/4 gives us:
(1/4) * (1/2x) - (1/4) * (1/4y) = (1/4) * (7/2)
Now simplify:
1/8x - 1/16y = 7/8
So, the first equation becomes:
1/8x - 1/16y = 7/8 ----> Equation 1
Now let's move on to the second equation:
3/4x + 1/3y = 19/2
Multiplying both sides of the equation by -1/3 gives us:
(-1/3) * (3/4x) + (-1/3) * (1/3y) = (-1/3) * (19/2)
Now simplify:
-1/4x - 1/9y = -19/6
So, the second equation becomes:
-1/4x - 1/9y = -19/6 ----> Equation 2
Now you have both equations in the form "y =", and you can solve them using various methods (substitution, elimination, etc.).