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-18 = 6x
x = -18/6 = -3
b. 5x-6 = -8x +4 >> pindah ruas 5x+8x = 4+6
13x = 10
x = 10/13
2x-6 = 8x +12
2x - 8x = 12 + 6
-6x = 18
-x = 3
x = -3
b. 5x-6 = 4(-2x+1)
5x - 6 = -8x + 4
5x + 8x = 4 + 6
13x = 10
x = 10/13