How do you evaluate the expression 9x + 5 + x + 8 if x= 7?

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How do you evaluate the expression 9x + 5 + x + 8 if x= 7?

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Answer 1 · 2018-03-27T12:13:51

See a solution process below:

Explanation:

To evaluate the expression when $x = 7$ $x = 7$ you substitute $7$ $color(red)(7)$ for each occurrence of $x$ $color(red)(x)$ in the expression and then execute the operations:

$9 x + 5 + x + 8$ $9color(red)(x) + 5 + color(red)(x) + 8$ become:

$(9 \cdot 7) + 5 + 7 + 8 \Rightarrow$ $(9 * color(red)(7)) + 5 + color(red)(7) + 8 =>$

$63 + 5 + 7 + 8 \Rightarrow$ $63 + 5 + color(red)(7) + 8 =>$

$68 + 7 + 8 \Rightarrow$ $68 + color(red)(7) + 8 =>$

$75 + 8 \Rightarrow$ $75 + 8 =>$

$83$ $83$

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How do you evaluate the expression 9x + 5 + x + 8 if x= 7?

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