Solve the equation:-
(i) $7 x - 9 y + 3 - 3 x - 5 y + 8$

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Solution

$7 x - 9 y + 3 - 3 x - 5 y + 8$
$= 7 x - 3 x - 9 y - 5 y + 3 + 8$
$= 4 x - 14 y + 11$

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7 x - 9 y + 3 - 3 x - 5 y + 8

7 x - 9 y + 3 - 3 x - 5 y + 8

Question 5

The equation which can not be solved in integers is

(a) 5y - 3 = -18

(b) 3x - 9 = 0

(d) 9y + 8 = 4y - 7

4 x + 9 y = 5

3 x - 5 y = 39

x

y

7 x - 9 y - 19 = 0; 4 x + 5 y - 21 = 0

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