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yg no 2)
a) x+2 <= 6
x <= 6-2
x <= 4
b) 10 >= 2x -6
10+6 >= 2x
16 >= 2x
8 >= x
x <= 8
c) tdk ada tanda , jd tdk bsa dkerjakan
d) -x-4 < 6-3x
-x+3x < 6+4
2x < 10
x < 10/2
x < 5
e) 3x + 10 < 5 + 5x
3x - 5x < 5 - 10
-2x < -5
x > 5/2
f) 3x >= 5x -10
3x - 5x >= -10
-2x >= -10
x <= 5
no 3)
a) 1/4 (5a-1) > 1/3(2a+ 1) kalikan dg 12 kedua ruas
3(5a-1) > 4(2a+1)
15a - 3 > 8a + 4
15a - 8a > 4+3
7a > 7
a > 1
b) yg b tdk ad tnda pertidaksamaannya , tdk dapat dikerjakan
c) 1 - 2(2x+1) > 2-(x-1)
1 -4x - 2 > 2 - x + 1
-4x + x > 3 + 1
-3x > 4
x < -4/3
d) 8+4x < 7x-9
4x - 7x < -9-8
-3x < -17
x > 17/3