B. x ≤ 9
Penjelasan dengan langkah-langkah:
5/8(x + 4) ≥ 7x/8 + 1/4 (kedua ruas x 8)
5(x + 4) ≥ 7x + 2
5x + 20 ≥ 7x + 2
5x - 7x ≥ 2 - 20
-2x ≥ -18
x ≤ -18/(-2)
x ≤ 9
5/8(x + 4) ≥ 7x/8 + 1/4
5(x) + 5(4) ≥ 7x + 2
(5 - 7)x ≥ 2 - 20
-2x ≥ -(20 - 2)
x ≥ -18/-12
x ≥ 18/2
x ≥ 9/1
x ≥ 9
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B. x ≤ 9
Penjelasan dengan langkah-langkah:
5/8(x + 4) ≥ 7x/8 + 1/4 (kedua ruas x 8)
5(x + 4) ≥ 7x + 2
5x + 20 ≥ 7x + 2
5x - 7x ≥ 2 - 20
-2x ≥ -18
x ≤ -18/(-2)
x ≤ 9
5/8(x + 4) ≥ 7x/8 + 1/4
5(x + 4) ≥ 7x + 2
5(x) + 5(4) ≥ 7x + 2
5x + 20 ≥ 7x + 2
(5 - 7)x ≥ 2 - 20
-2x ≥ -(20 - 2)
-2x ≥ -18
x ≥ -18/-12
x ≥ 18/2
x ≥ 9/1
x ≥ 9