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kalikan 20 biar pecahannya ilang
4(2x + 1) ≤ 5 ( x + 5 )
8 x + 4 ≤ 5x + 25
8x - 5x ≤ 25 - 4
3x ≤ 21
x ≤ 7
HP { 7, 6, 5 ....}
untuk nomer 9 dan 10, maaf ga bisa upload grafiknya