The value of $x + y + z = 50$ . If $x = 5$ and $y = 15$ , then find the value of $z$ .

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Solution

The correct option is A 30
Given: $x + y + z = 50$ , $x = 5$ , $y = 15$ , $z = ?$

$5 + 15 + z = 50$

$20 + z = 50$

$20 + z - 20 = 50 - 20$

$z = 30$

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