SOLUTION: i need help solving this equation by using the elimination method. y=-3/4x+1/4 y=3/4x-3/4 my teacher hasnt taught me how to solve these kind of equations in fractions. tha

Algebra ->  Linear-equations -> SOLUTION: i need help solving this equation by using the elimination method. y=-3/4x+1/4 y=3/4x-3/4 my teacher hasnt taught me how to solve these kind of equations in fractions. tha      Log On


   

Question 106139: i need help solving this equation by using the elimination method.
y=-3/4x+1/4
y=3/4x-3/4
my teacher hasnt taught me how to solve these kind of equations in fractions.
thanks for the help
Answer by HyperBrain(694) About Me  (Show Source):
You can put this solution on YOUR website!
It is kind boring if we use that method.
So I prefer this exciting method.

Since y=-3x%2F4%2B1%2F4 and y=3x%2F4-3%2F4, then,
-3x%2F4%2B1%2F4=3x%2F4-3%2F4
4%28-3x%2F4%2B1%2F4%29=4%283x%2F4-3%2F4%29
-3x%2B1=3x-3
3x-3=-3x%2B1
3x%2B3x-3=-3x%2B3x%2B1
6x-3=0%2B1
6x-3=1
6x-3%2B3=1%2B3
6x%2B0=4
6x=4
6x%2F6=4%2F6
%286%2F6%29x=4%2F6
1%2Ax=2%2F3
x=2%2F3
To solve for y, let's choose from the two---y=-3x%2F4%2B1%2F4 and
y=3x%2F4-3%2F4
I choose ---y=-3x%2F4%2B1%2F4 . so,
y=-3%282%2F3%29%2F4%2B1%2F4
y=%28-6%2F3%29%2F4%2B1%2F4
y=-2%2F4%2B1%2F4
y=%28-2%2B1%29%2F%284%29
y=-1%2F4
Power up,
HyperBrain!