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How do you solve #5/b=3/9#?

Answer 1

Abigail Allen

#b=15#

start off by writing #5/b=3/9#

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

you now have #3b=45#

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

work: #5/b=3/9# #3b=45# #b=15#

TO CHECK, plug in #15# for #b# #5/15=3/9#

simplify #1/3=1/3#

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Answer 2

Nathan Axel

To solve the equation 5/b = 3/9, you can cross-multiply. Multiply 5 by 9 to get 45, and multiply b by 3 to get 3b. This gives you the equation 45 = 3b. To isolate b, divide both sides of the equation by 3. The solution is b = 15.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.