Friday, August 7, 2015

Solve for b given that (2b-3)/(3b+2)=(2b+1)/(3b-2)

Do you mean to solve (2b-3)/(3b+2) = (2b+1)/(3b-2)
?


Cross multiply:


(2b-3)(3b-2)
= (2b+1)(3b+2)


6b^2-4b-9b+6 =
6b^2+4b+3b+2


Collect like terms
together:


(6-6)b^2+(-4-9-4-3)b+6-2 =
0


-20b+4 = 0


20b =
4


b = 4/20


b =
1/5.


But


2b-3/3b+2=2b+1/3b-2
is different from (2n-3)/(3b+2) = (2b+1)/(3b-2)


We solve
2b-3/3b+2=2b+1/3b-2 as


Collect like terms on one side and
nubers on the other side.


2b-2b -3/3b-1/3b =
-2-2


-4/3b = -4


3b/4 =
1/4


b
=1/3.

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