SOLUTION: linear combination {2x + y=7 {4x 2y=5

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Question 199266: linear combination
{2x + y=7
{4x 2y=5
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
2x + y=7
y=-2x+7 (red line)
4x(-)2y=5
-2y=-4x+5
y=-4x/-2+5/-2
y=2x-2.5 (green line)
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+-2x+%2B7%2C+2x+-2.5%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -2x +7 and 2x -2.5).
y=-2x+7
y=2x-2.5
-2x+7=2x-2.5
-4x=-7-2.5
-4x=-9.5
x=-9.5/-4=2.375 ans. for the x value.
y=-2*2.375+7
y=-2.25 ans. for the y value.