Mathematics
18 Online
OpenStudy (anonymous):
Solution to 3x/4 + 1/4?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
\[\frac{ 3x }{ 4 }+\frac{ 1 }{ 4}=0\]
OpenStudy (anonymous):
=5, sorry
OpenStudy (anonymous):
okay what do you notice is common between the two fractions?
OpenStudy (anonymous):
the denominator :)
OpenStudy (anonymous):
so multiply both sides by 4 (the denominator)
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
the expressions are equal to five, did you see that, just making sure
OpenStudy (anonymous):
?
OpenStudy (anonymous):
@scorpions786 I need you :c
OpenStudy (anonymous):
OKay still multiply by 4.
OpenStudy (anonymous):
what do you get?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
I dont understand :c why multiply by four if they are already the same?
OpenStudy (anonymous):
You are trying to solve for x correct?
OpenStudy (anonymous):
yes :) is that why?
OpenStudy (anonymous):
let me show you what I mean...
OpenStudy (anonymous):
okay
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
what you have is this...\[\frac{ 3x+1 }{ 4}=5\]
OpenStudy (anonymous):
now you want to isolate 3x+1 on one side, to get rid of that silly fraction.
OpenStudy (anonymous):
3x+1=20, then?
OpenStudy (anonymous):
Great job! then what, you tell me.
OpenStudy (anonymous):
subtract one from both sides and divide by three
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
?
OpenStudy (anonymous):
yes! so what is x?
OpenStudy (anonymous):
Well If I didn't have options, I would attempt to make a decimal; however my options are x=19/3, x=7, x=3/4, and x=17... so x=19/3? :)
OpenStudy (anonymous):
correct!
OpenStudy (anonymous):
Thank you oh so much :):):)
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
\[\frac{ 3x }{ 4 }+\frac{ 1 }{ 4 }=5\]
\[\frac{ 3x+1 }{ 4 }=5\]
\[3x+1=20\]
\[3x=19\]
\[x=\frac{ 19 }{ }\]
do you understand everything
OpenStudy (anonymous):
you know, there is also another method of solving this... it is called plugging in.
OpenStudy (anonymous):
ukk x=19/3 as my final
OpenStudy (anonymous):
Haha, thank you both, I do understand now. I feel so silly because of how simple it was :p
OpenStudy (anonymous):
you're welcome :)
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
:)
OpenStudy (anonymous):
and if you ever get stuck , you can always plug in each value that x might equal to get 5... until you get the right answer.
OpenStudy (anonymous):
Thank you, also very helpful :):)
OpenStudy (anonymous):
so in this case, \[\frac{ 3(\frac{ 19 }{ 3 }) }{ 4 }=5\]
OpenStudy (anonymous):
and you're welcome ☺