Simplify the expression and find the value if $x = 2$
$3 (x + 2) + 5 x - 7$

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Solution

Given $3 (x + 2) + 5 x - 7$
Put $x = 2$
$3 (x + 2) + 5 x - 7 = 3 (2 + 2) + 5 (2) - 7 = 3 (4) + 10 - 7 = 12 + 10 - 7 = 15$
Hence, $3 (x + 2) + 5 x - 7$ is $15$ when $x = 2$

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