3x-5y-4=o and 9x=2y+7
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Answer:
x=9/13and y= -5/13
Step-by-step explanation:
3x-5y-4=0.......(1)
9x-2y+7.........(2)
From equation(1) we have:
3(3x-5y-4=0)==>9x-15y-12=0.....(3)
Substracting(2) from (3),
9x-15y-12=0
9x-2y-7=0
(-) (+) (+)
__________
-13y-5=0
___________
===>y=(-5/13)
Now from (1),we get
3x-5(-5/13)-4=0
===> 3x+25/13-4=0
===> 3x=-25+52/13=27/13
===>x=27/13×1/3=9/13
Thus,x=9/13 and y = -5/13
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