If $x = 4$ , evaluate
(i) $12 x + 7$ .

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Solution

Given: $12 x + 7$

Subttituting $x = 4$ , in the given expression

$12 x + 7 = 12 \times 4 + 7$
$= 48 + 7$
$= 55$

Hence, the value of $12 x + 7$ for $x = 4$ is $55$ .

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