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2x-5y=4 and 7x-3y=4 using addition method

label Algebra
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how do i solve this 

Nov 20th, 2014

6x-15y =12

-35x+15y=- 20

adding 

-29x = 12-20=-8

x = 8/29

16/29 -5y =4

-5y =4-16/29 =100/29

y = -20/29


Nov 20th, 2014

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