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3x - 18 = 12+8 x
3x-8x = 12+18
-5x = 30 kedua ruas dikalikan -1
5x= -30
x= -6
2 3
x6
3 ( x - 6 ) = 2 + 8x
3x - 18 = 2 + 8x
18 + 2 = 8x -3x
20 = 5x
20 = 5x
5 5
4 = x