Algebra
posted by jessica .
Can someone show me step by step how to do this problem to have an example to go by so I will be able to do my other problems. Thanks
Solve by substitution
4x12y=5
x+3y=1
I know that you have solve one of the equations. I have picked the second one so it would be y= 1/3+1/3x right??
Then I substitute 4x12(1/3+1/3x)=5.
Now I have no clue what to do from there. Please help.
Couldn't find a variable to solve for.
This equation is invalid, the left and right sides are not equal, therefore there is no solution.If that right?
In the bottom, rearrange to read
x= 3y+1
Now put that value for x in the top equation...
4x12y=5
4( 3y+1)12y=5
then solve for y.
when you get y, go back and put it in
x= 3y+1 to get x.
I suggest you show your number as
y=[(x1)/3
Then 4x 12[(x1)/3] = 5
Then 4x 4(x1) = 5
etc. I'm sure you can handle it from here.
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