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a) 2x + 1 < 7 b) -(2x + 1) < 7
2x < 6 -2x - 1 < 7
x < 3 -2x < 8
-x < 4
x > -4
HP {x<3 dan x>-4}
2. |x - 5| > 4
a) x - 5 > 4 b) -(x - 5) > 4
x > 9 -x + 5 > 4
-x > -1
x < 1
HP{x>9 dan x<1}
semoga membantu ( kalo betul) :v