How do you solve $7/b=1/9$ ?

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Answer 1 · 2016-10-11T17:23:27

$b=63$

$7/b=1/9$ is our equation, which we divide, multiply, manipulate, so long as we do it to both sides of the equation.

We can mulitply both sides by $b$ :

i.e. $7/bxxb=b/9$ ;

$7=b/9$ ; and now mulitply both sides by $9$ :

$7xx9=63=b$ .

How do you solve 7/b=1/97/b=1/9?