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Verified answer
Materi : Nilai MutlakBahasan : Persamaan Nilai Mutlak
Jawaban : x = - 3 atau x = 4
Langkah - langkah :
|f(x)| = a, maka f(x) = a atau f(x) = - a
|2x - 1| = 7
2x - 1 = 7
2x = 7 + 1
2x = 8
x = 4
2x - 1 = - 7
2x = - 7 + 1
2x = - 6
x = - 3