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|3-2x| ≤ 4|2+x|
a)
3-2x ≤ 4(2+x)
3-2x ≤ 8 + 4x
-6x ≤ 8 -3
x ≥ - 5/6
b)
-2x + 3 ≤ 4 (-2 - x)
- 2x + 3 ≤ -8 - 4x
2x ≤ - 8 - 3
x ≤ -11/2
HP x ≤ -11/2 atau x≥ - 5/6