Nilai x yang memenuhi persamaan 5|×-7|+2=7 adalah?? Tolong bantu jawab pakek cara
Matematika
Wulan03111
Pertanyaan
Nilai x yang memenuhi persamaan 5|×-7|+2=7 adalah?? Tolong bantu jawab pakek cara
2 Jawaban
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1. Jawaban Anonyme
5(x-7) +2 =7 atau 5(-x+7) + 2 = 7
5x-35=5 -5x +35 = 5
5x = 40 -5x = -30
x = 8 x = 6 -
2. Jawaban Jeki23steady
5|×-7|+2=7, utk x > 7
5x - 35 + 2 = 7
5x -33 = 7
5x = 7 + 33
5x = 40
x = 40/5
x = 8
5-|×-7|+2=7, utk x < 7
-5x + 35 + 2 = 7
-5x + 37 = 7
-5x = 7 - 37
-5x = -30
x = -30/-5
x = 6
HP : {x = 8, x = 6}