Jawabanmu

2014-01-18T18:33:17+07:00
A. 7 - 5x = 35 - x
7 - 35 = -x + 5x
-28 = 4x
x =  \frac{-28}{4} = 7
himpunan nya {7} karena tandanya samadengan. 

b. 5x + 4 = 3(x-2)
5x + 4 = 3x - 6
5x - 3x = -6 - 4
2x = -10
x = -5

c. (x-8) + 4 = 3(2x + 7) - 9
x - 8 + 4 = 6x + 21 - 9
x - 4 = 6x + 12
-4 - 12 = 6x - x
-16 = 5x
x  = -3,2