Solve the following simultaneous equations by elimination method and find the value of $x + y$ $2 x - y - 3 = 0; 4 x - y - 5 = 0$

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Solution

$2 x - y = 3$ ......(1)
$4 x - y = 5$ ......(2)
Subtracting (1) and (2) we get,
$x = 1$
Re substituting $x = 1$ in (1) we get,
$y = - 1$

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