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-97/36-1/1=-2/3(-1/3n+4/3)

 Jun 7, 2016
 #1
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Solve for n:
(-133)/36=(-2 (4/3-(n)/(3)))/(3)

 

4/3-(n)/(3)=(4-n)/3:
(-133)/36=(-2)/3 (4-n)/3

 

3×3 = 9:
(-133)/36=(-2 (4-n))/9

 

(-133)/36=(-2 (4-n))/9 is equivalent to (-2 (4-n))/9=(-133)/36:
(-2 (4-n))/9=(-133)/36

 

Multiply both sides of (-2 (4-n))/9=(-133)/36 by -9/2:
(-9 (-2) (4-n))/(2×9)=(-9)/2×(-133)/36

 

(-9)/2×(-133)/36=(-9 (-133))/(2×36):
(-9 (-2) (4-n))/(2×9)=(-9 (-133))/(2×36)

 

(-9)/9=(9 (-1))/9=-1:
(-2-1 (4-n))/2=(-9 (-133))/(2×36)

 

(-2)/2=(2 (-1))/2=-1:
--1 (4-n)=(-9 (-133))/(2×36)

 

(-1)^2=1:
4-n=(-9 (-133))/(2×36)

 

The gcd of -9 and 36 is 9, so (-9 (-133))/(2×36)=((9 (-1)) (-133))/(2 (9×4))=9/9×(-(-133))/(2×4)=(-(-133))/(2×4):
4-n=(-133-1)/(2×4)

 

2×4 = 8:
4-n=(-(-133))/8

 

-(-133) = 133:
4-n=133/8

 

Subtract 4 from both sides:
(4-4)-n=133/8-4

 

4-4=0:
-n=133/8-4

 

Put 133/8-4 over the common denominator 8. 133/8-4 = 133/8+(8 (-4))/8:
-n=133/8-(4×8)/8

 

8 (-4) = -32:
-n=133/8+-32/8

 

133/8-32/8 = (133-32)/8:
-n=(133-32)/8

 

133-32=101:
-n=101/8

 

Multiply both sides of -n=101/8 by -1:
(-n)/(-1)=(-101)/8

 

(-1)/(-1)=1:
Answer: |  n=(-101)/8

 Jun 7, 2016

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