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4x 2 Y 2 4

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Question 565099: y=4x-two
y=-2x+iv

Reply by Foliage W.(135) About Me (Show Source):

Yous tin put this solution on YOUR website!
ane. First, change the equations and then that if one is either added or subtracted from the other, one of the variables (ten or y) would cancel out. For example, you might change 2y = x - iv to 4y = 2x - eight so that when added to -4y = 3x + 7, the 4y and -4y would abolish out. In your equations, this is not necessary because when y and y are subtracted, they cancel ane another out.
two. Subtract/add your equations. In your case, y'all would decrease so that the y's would cancel out.
y = 4x - two
-(y = -2x + iv)
==> 0 = 6x - 6
3. Discover the value of the not-canceled out variable.
0 = 6x - half dozen
+vi +vi
vi = 6x
i = x
4. Plug this value for x into one of the equations (it does non affair which one) and solve for y.
y = 4x - ii
y = 4(i) - 2
y = 4 - 2
y = 2
five. Y'all at present have your 10 and y values. Simply plug them into coordinate form (x,y) for your reply. ==> (i,ii)


4x 2 Y 2 4,

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