SOLUTION: y=4x 8x−4y=-40

Algebra.Com
Question 1209143: y=4x 8x−4y=-40

Answer by ikleyn(52810)   (Show Source): You can put this solution on YOUR website!
.

From the first equation, substitute y = 4x into the second equation.


You will get

    8x - 4(4x) = -40,

    8x - 16x = -40

      -8x    = -40

        x    =  =  = 5.


Then from the first equation  y = 4x = 4*5 = 20.


ANSWER.  x= 5,  y= 20.

Solved.




RELATED QUESTIONS

8x+4y=12;y (answered by Alan3354)
given the line 8x-4y=40,give the coordinates of the x- and y- intercepts and graph the... (answered by JBarnum)
Can you put these into y=mx+b x-y=0 5x-3y=10 and x-2y=1 5x-4y= -23 and... (answered by Alan3354,stanbon)
sketchthe feasible region(in Quadrant 1 only) for the following system of linear... (answered by stanbon)
4x-2y=-3 8x-4y=5 (answered by mananth)
what is the substitution for 4y+4x=40... (answered by dabanfield)
Use the substitution method to solve 3x-y=-10... (answered by richwmiller)
find the vertices and foci of the hyperbola 4x²-y²-48x-4y+40=0 (answered by lwsshak3)
20. 8x – 4y = 16 y = 2x – 4 (answered by daniellagirl89,jim_thompson5910)