Question

5x+ 3y=9 ,2x-3y=12 solve simultanious equation​

Answer 1

Answer:

5x+3y=9..........(1)

2x-3y=12.........(2)

_______

7x=21

x=21/7

x=3..........

putting value of x in eq.(1)

5x+3y=9

5(3)+3y=9

15+3y=9

3y=9-15

3y=(-6)

y= (-6)/3

y=(-3).........

the correct ans is x=3 and y= (-3)

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Answer 2

5x+3y=9 --------(1)

2x-3y=12 ---------(2)

add- (1) & (2)

7x=21

x=3

putting the value of x =3 in (1) we get,

5(3)+3y=9

15+3y=9

3y=9-15-6

y= -2

thus, (x, y) = (3,-2)