Question

solve
12x + 15y +18 = 0
18x - 7y + 86 = 0
solve it fast plz​

Answer 1

Answer:

12x+15y= -18 -------i

18x-7y= -86 -------ii

Multiply eq i and ii by 3 and 2 respectively.

3(12x+15y= -18)

36x+45y = -54 ------iii

2(18x-7y = -86)

36x-14y = -172 -------iv

Substract eq iv from iii

36x+45y= -54

36x-14y= -172

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59y=118.

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y=2.

Put Y=2 in eq i

12x+15*2= -18

12x= -18-30.

12x= -48.

x= -4.

So, x= -4 and y= 2.