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Coordinates 4x+2y=8

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This is an equation of a straight line, and we can easily find the the coordinates where this line intersects the axis in following ways:-

for x-axis:-
put y=0, 4x+2*0=8
4x =8
x =8/4
x =2
so intersection coordinates ate (2, 0)

for y-axis:-
put x=0, 4*0+2y=8
2y =8
y =8/2
y =4
so intersection coordinates ate (0, 4)


Zulfikar ali

Posted on Feb 06, 2009


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How do I solve (3x-2y)2(3xy-3)

First, we will find y in terms of x. We will use the first equation to determine this.
We can subtract 4x from both sides:
And then divide both sides of the equation by two:
Since we now have y in terms of x, we can substitute this into our second equation.
Then, we can distribute the minus sign
Next, we can add 1 to both sides of the equation.

Finally, we divide both sides by negative one to isolate x.
Now that we have x's value, we can find y's value.
The first thing that we determined is:
We can substitute in the value of x to this equation.
Therefore, we now have the values of both variables.

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Write the equation of a line parallel to the given line but passing through the given point. y=1/4x-2;(8,-1)

Being parallel to the given line, the equation of the line you are seeking has the same slope, which in this case is a=1/4.
So the equation sought is as follows
y=(1/4)x +b, where b is to be found.
To find b, use the stated fact that the line passes through the point (x=8, y=-1). All that means is that the point (8,-1) is on the line whose equation you are looking for. If it is on the line with equation y=(1/4)x+b
then its coordinates x=8, and y=-1 satisfy the relation y=(1/4)x+b. In other words, if you substitute 8 for x, and -1 for y, the equality holds true -1=(1/4)*8 +b
This gives you a way to find the initial value of the function (the y-intercept b ). Just solve -1=(1/4)*8 +b to find b.
I leave this pleasure to you.

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2 Answers


2x + 4y = -8 ; divide each side by 2
x + 2y = -4 ; subtract x from both sides
2y = -4 - x ; rearrange
2y = -1x -4 ; divide each side by 2
y = -1/2x - 2 ; relate to slope/intercept form of line (y=mx+b)

implies there are multiple solutions that fall along a line with slope -1/2 and y intercept of -2
\ '
\ '
\ '
Sample points on this line are (-4,0), (-2,-1), (0,-2), (2,-3)

Nov 04, 2010 | Mathsoft StudyWorks! Mathematics Deluxe...

1 Answer

2x-4y=8 simplify

=> 2[x-2y]=8
=> x-2y=8/2

=> x-2y=4

Feb 07, 2010 | Mathsoft StudyWorks! Mathematics Deluxe...

1 Answer

Foil Method 2(3x-4)(4x+5)

You have the method: apply it.
2 *(3x-4)(4x+5) =(6x-8)(4x+5)
Now apply the FOIL method
F: 6x*4x=24x^2
O: 6x*5=30x
I; -8*4x=-32x
L: -8*5=-40

so the result is
24x^2 + 30x-32x -40 =24x^2 -2x-40

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1 Answer

4x+8y=20 -4x+2y=-30

4x+8y=20 || /4

-4x+2y=-30 || /2

x=5-2y || y=-1

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Find the y coordinate in the solution of -3x+y=5 if x=1

This is the process of how you would solve this.

-move the -3x over to the right hand side, so you have:
y = 5 + 3x

- since you know what x is, plug in the x which is 1:
y = 5 + 3(1)

- solve the equation
y = 5+3

y = 8, so the solution is 8.

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Solving systems of equations by elimination

Hi joanmae jmeh;

You can add these equations just like you would numbers

3x + 2y = 7
5x - 2y = 1
8x =8
Now plug x = 1 back into either equation and you can solve for y
Y = 2

When you add the 2 equations together the +2y and the -2y cancel

Hope this helps Loringh Please leave a rating for me Thks

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Algebra 1

B. 2((2-Y)/3)-Y=3

A. 3X+(-1.67)=2

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