How do you evaluate $7 b - 9$ $7b - 9$ for b=9?

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Answer 1 · 2016-05-08T12:19:55

$= 54$ $= 54$

$7 b - 9$ $7b - 9$

The value of the variable is :
$b = 9$ $color(blue)(b = 9$

Substituting the same in the expression.
$7 b - 9 = 7 \cdot 9 - 9$ $7b - 9 = 7 * color(blue)(9)- 9$

$= 63 - 9$ $= 63 - 9$

$= 54$ $= 54$

How do you evaluate 7b−97b - 9 for b=9?