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Camryn Cain
Mathematics
8 March, 02:45
9. 2x - 3y = 21
y=3-x
+1
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1
)
Braniac
8 March, 03:00
0
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)
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