Question

Nilai x yang memenuhi persamaan 5|×-7|+2=7 adalah?? Tolong bantu jawab pakek cara

Answer 1

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

Answer 2

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}