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3x + 2y = 29 ; …

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3x + 2y = 29 ; 5x - y = 18
  • 1 answers

Yogita Ingle 4 years, 11 months ago

3x + 2y = 29  .......... (i)
5x - y = 18  .......... (ii) 
multiply equation (ii) by 2 and add in (i) ,  we get
3x + 2y = 29
+10x - 2y = 36
____________
13x=65
x = 65/13=  5
now put in (ii), we get
5(5) - y = 18
25 - y = 18
25 - 18 = y
7 = y
and x = 5


 

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