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If x=4, evalu...

Question

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

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Solution

Given: $12 x + 7$
Substituting $x = 4$ 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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