How do you solve $\frac{5}{b} = \frac{3}{9}$ $5/b=3/9$ ?

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Answer 1 · 2016-09-25T04:55:17

$b = 15$ $b=15$

start off by writing
$\frac{5}{b} = \frac{3}{9}$ $5/b=3/9$

cross multiply
$(3) (b) and (5) (9)$ $(3)(b) and (5)(9)$

you now have
$3 b = 45$ $3b=45$

divide each side by $3$ $3$
$b = 15$ $b=15$

work:
$\frac{5}{b} = \frac{3}{9}$ $5/b=3/9$
$3 b = 45$ $3b=45$
$b = 15$ $b=15$

TO CHECK, plug in $15$ $15$ for $b$ $b$
$\frac{5}{15} = \frac{3}{9}$ $5/15=3/9$

simplify
$\frac{1}{3} = \frac{1}{3}$ $1/3=1/3$

How do you solve 5/b=3/95b=395/b=3/9?