The sides of a triangle are in the ratio 3: 4: 5. What is the length of each side if the perimeter of the triangle is 90cm *further details inside*

Question

anonymous · Answer

I don't usually ask these kind of questions. But I am having a ridiculous argument and I don't understand how these two people are getting a different answer. Mine makes sense. and theirs do not. I would like to see an explanation.

anonymous · Answer

dude idk the answer man honestly

anonymous · Answer

My logic was to assume the triangle had sides $a$, $b$, $c$ and to state that:
$$a+b+c=90$$
Then relate the sides to an arbitrary variable $x$ and set the following:
$a=3x$
$b=4x$
$c=5x$
Plug them in to the equation:
$$3x+4x+5x=90\phantom{spc}\rightarrow\phantom{spc}x=7.5$$
Then use that to find out the respective lengths.
Is that correct?

candy13106 · Answer

ok do u have answer choices for that

candy13106 · Answer

look its just a question man
lay off

candy13106 · Answer

really can u plz help me

anonymous · Answer

solve this $$-2\le2x-4<4$$

anonymous · Answer

yes @KeithAfasCalcLover , that's correct

candy13106 · Answer

ok so wats the answer to that may i ask

candy13106 · Answer

hahahahah how funny c u tomorrow for more help

anonymous · Answer

22.5, 30, 37.5

anonymous · Answer

lol Thank you @pgpilot326 Talk to you guys later