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x - 2 / 3 = 2x - 5 / 2 (kali silang)
2x - 4 = 6x - 15
-4x = -11
x = 11/4
maka 2x = 2(11/4) = 5.5
no 7.
3 - 4x > 9 - 2x
- 4x + 2x > 9 - 3
- 2x > 6 (bagi -2)
maka x < -3
no 8.
2 (3x - 1) > 3x + 10
6x - 2 > 3x +10
3x > 12 (bagi 3)
x > 4