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3x - 2x ≤ 2 + 4
x ≤ 6
3) K = (2 x p) + (2 x l)
36 = (2 x (3x - 4)) + (2 x (X + 2))
36 = 6x - 8 + 2x + 4
36 = 6x+2x -8+4
36 = 8x - 4
36 + 4 = 8x
40 = 8x
x = 40/8 = 5
x + 2 = 5 + 2 = 7 cm
4) 3(x-2) ≤ 6(x-3)
3x - 6 ≤ 6x - 18
3x-6x ≤ -18 + 6
-3x ≤ -12 ( karna (-) keduanya harus dikali -1 dan tanda pun berbalik)
x ≥ 12/3 = x ≥ 4
6) 2x - 1 < 4x + 5
2x - 4x < 5 + 1
-2x < 6
x < 6/-2
x < -3