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=3x-2 ≥ 20
=3x ≥20+2
= 3x≥ 22
= x≥22/3
2 ma`af saya tidak tahu nomor dua kalau kata saya soalnya salah
3. 3x+2 ≥ (3x-1)(3)
=3x+2 ≥ 9x-3
=2+3 ≥9x-3x
=5 ≥ 6x
=x ≥ 5/6
4.2x-3 < 7*4
=2x-3<28
=2x<28+3
=2x<31
=x<31/2
semoga benar
Nomor 3.
Ambil gabungannya, didapat: