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2x - 1 = 2 - 3x
2x + 3x = 2 +1
5x = 3
x = 3/5
maaf kalo salah
no.2
x + 1 = 2x - 3
x - 2x +-3 - 1
-2x = -4
x = -4/-2 karna mutlak menjadi 4/2