Mathematics
14 Online
OpenStudy (anonymous):
x-(12-x)=38
Join the QuestionCove community and study together with friends!
Sign Up
myininaya (myininaya):
Distribute the negative like x-12+x=38
myininaya (myininaya):
like terms 2x-12=38
OpenStudy (anonymous):
My math teacher wants us to show each step and Im confused
myininaya (myininaya):
add 12 to both sides: 2x=38+12
myininaya (myininaya):
2x=50
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
then you divide
myininaya (myininaya):
Now divide both sides by 2: x=50/2=25
OpenStudy (anonymous):
Oh! Thankyou
myininaya (myininaya):
That's all. You not confused about any of the steps?
OpenStudy (anonymous):
Actually i am
Join the QuestionCove community and study together with friends!
Sign Up
myininaya (myininaya):
Where do you get stuck?
OpenStudy (anonymous):
The first
myininaya (myininaya):
So you know subtraction can be turned into addition right?
myininaya (myininaya):
3-5=3+(-5)
OpenStudy (anonymous):
Mhm
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
yea
OpenStudy (anonymous):
but isnt it distributive property
myininaya (myininaya):
So we have 12+-(12-x)=38
myininaya (myininaya):
that - in front of that paranthesis can be read at -1
myininaya (myininaya):
so what is -1(12-x)?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
Huh??!!! you totaly confused
myininaya (myininaya):
the changing subtraction to addition?
OpenStudy (anonymous):
because for example she said to do multiplication during distributive property
3(12+9)
myininaya (myininaya):
Right
OpenStudy (anonymous):
(3*12)+(3*9)
Join the QuestionCove community and study together with friends!
Sign Up
myininaya (myininaya):
yes so what is -1(12-x)
OpenStudy (anonymous):
(-1*12)-(-1*x)
myininaya (myininaya):
yes which =-12+x
OpenStudy (anonymous):
yeeees
myininaya (myininaya):
now we have x+(-12+x)=38
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
why do you have to change the sub sign
myininaya (myininaya):
since addition is commutative and associative we have x+x-12=38
OpenStudy (anonymous):
cant you just put 12x?
myininaya (myininaya):
?
myininaya (myininaya):
x+x=2x
Join the QuestionCove community and study together with friends!
Sign Up
myininaya (myininaya):
so we have 2x-12=38
OpenStudy (anonymous):
then i know
myininaya (myininaya):
+12 on both sides giving us 2x=50 then divide both sides by 2
OpenStudy (anonymous):
from here
myininaya (myininaya):
ok
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
ohhhhhh i get it!!
OpenStudy (anonymous):
i <3 you thankyou!!!!!!!11
myininaya (myininaya):
:)
OpenStudy (anonymous):
have an awesome day
myininaya (myininaya):
i finished it? That's all you needed? lol
Join the QuestionCove community and study together with friends!
Sign Up
myininaya (myininaya):
ok no worries lets just find your mistake