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Materi : Nilai MutlakBahasan : Persamaan Nilai Mutlak
Jawaban : x = 10 atau x = 4
Langkah - langkah :
- 5|x - 7| + 2 = - 13
- 5|x - 7| = - 15
|x - 7| = 3
(x - 7)² = 3²
x² - 14x + 49 = 9
x² - 14x + 40 = 0
(x - 10) (x - 4)
x = 10 atau x = 4