A)x+8>12
x > 12 - 8
x > 4
--------------------------
B)x+7≤5
x ≤ 5 - 7
x ≤ -2
----------------------------
C)4x-15<1
4x < 1 + 15
x< 16/4
x < 4
----------------------
D)3x-10≥x-3
3x ≥ - 3 + 10
3x ≥ 7
x ≥ 7/3
---------------------
E)4.(x-2)≤0
4x - 8 ≤ 0
4x ≤ 8
x ≤ 8/4
x ≤ 4
F) 3x+1≥2.(x-3)
3x + 1 ≥ 2x - 6
3x - 2x ≥ - 6 -1
x ≥ - 7
-------------------------------
G)2-4x≥x-10
- 4x - x ≥ - 10 - 2
-5x ≥ - 12 (-1)
x ≤ 12/5
----------------------------------
H)8.(x+3)>12.(1+x)
8x + 24 > 12 + 12x
8x - 12x > 12 - 24
- 4x > -12 (-1)
x < 12/4
x < 3
bons estudos
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A)x+8>12
x > 12 - 8
x > 4
--------------------------
B)x+7≤5
x ≤ 5 - 7
x ≤ -2
----------------------------
C)4x-15<1
4x < 1 + 15
x< 16/4
x < 4
----------------------
D)3x-10≥x-3
3x ≥ - 3 + 10
3x ≥ 7
x ≥ 7/3
---------------------
E)4.(x-2)≤0
4x - 8 ≤ 0
4x ≤ 8
x ≤ 8/4
x ≤ 4
----------------------
F) 3x+1≥2.(x-3)
3x + 1 ≥ 2x - 6
3x - 2x ≥ - 6 -1
x ≥ - 7
-------------------------------
G)2-4x≥x-10
- 4x - x ≥ - 10 - 2
-5x ≥ - 12 (-1)
x ≤ 12/5
----------------------------------
H)8.(x+3)>12.(1+x)
8x + 24 > 12 + 12x
8x - 12x > 12 - 24
- 4x > -12 (-1)
x < 12/4
x < 3
bons estudos