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x+4y=8 2x-5y=29

 Feb 20, 2015

Best Answer 

 #2
avatar+98173 
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x+4y=8  2x-5y=29

Using the first equation, subtract 4y from both sides

So x  = 8 - 4y       and subbing this into the second equation foe x, we have

2(8 - 4y) - 5y = 29

16- 8y - 5y = 29   simplify

16 - 13y = 29       subtract 16 from both sides

-13y = 13             divide both sides by -13

y = -1 

And x = 8 - 4(-1)  = 8 + 4  = 12

 

 Feb 20, 2015
 #2
avatar+98173 
+5
Best Answer

x+4y=8  2x-5y=29

Using the first equation, subtract 4y from both sides

So x  = 8 - 4y       and subbing this into the second equation foe x, we have

2(8 - 4y) - 5y = 29

16- 8y - 5y = 29   simplify

16 - 13y = 29       subtract 16 from both sides

-13y = 13             divide both sides by -13

y = -1 

And x = 8 - 4(-1)  = 8 + 4  = 12

 

CPhill Feb 20, 2015

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