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|m + 4|- 2|-4| = 3
|m + 4| - 2(4) = 3
|m + 4| - 8 = 3
|m + 4| = 11
m + 4 = 11 atau m + 4 = -11
m = 7 atau m = -15
No. 3
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|3k| = 6
3k = 6 atau 3k = -6
k = 2 atau k = -2