1.

140x - 230y = -511 and -330x + 149y = -32

Answer»

140x - 230y = - 511   ....(i)

-330x + 149y = -32   ......(ii)

By applying 33 x (1) + 14 x (2) , we obtain

(4620x - 7590y) + (-4620x + 2086y) = -16863 - 448

⇒ - 5504 y = -17311

⇒ \(y = \frac{17311}{5504} \approx 3.145\)

From (i), we get 

140x = 230y - 511

= 230(3.145) -511

= 212.35

⇒ \(x \approx \frac{212.35}{140}\approx 1.517\) 

Hence, x \(\approx\) 1.517 & y \(\approx\) 3.145 is solution of given system.



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