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In a rectangular coordinate system, the line 5y = 2x intersects the line 3x - 9y = 7 at point Z. What is the sum of the coordinates of point Z?

 Nov 18, 2020
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y = 2/5 x    sub into second equation

 

3x - 9(2/5 x) = 7

x = -11 2/3

 

y = 2/5 x =  - 4 2/3

 Nov 18, 2020

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