Answer: (6,-3)
Explanation:
(1) 2 x-3y=21
(2) y = 3 − x
Substituting eq 2 in eq 1
2 x − 3 ( 3-x)=21
2 x-9+3x=21
5 x − 9 = 21
5 x = 30
x = 6
Put x= 6 in eq 2 we get,
y =3 − 6
y = − 3
Solution : ( 6 , − 3 )
