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artinya ada dua kemungkinan,
1) (3x-2) = 10
3x-2 = 10
3x = 10+2
3x = 12
x = 12/3
x = 4
2) -(3x-2) = 10
-(3x-2) = 10
-3x+2 = 10
-3x = 10-2
--3x = 8
x = - 8/3
jadi, HP = {-8/3 , 4}