Jawabanmu

2014-02-03T17:14:06+07:00
X-3 ≤ 7
x ≤ 7 + 3
x ≤ 10
2014-02-03T17:15:14+07:00
X - 3 ≤ 7
x ≤ 7 + 3
x ≤ 10