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2m = 31-15
2m = 16
m = 16/2
m = 8
pertanyaan 2m + 15 -9 = 31 - 9
2m + 6 = 22
2m = 22-6
2m = 16
m = 16/2
m = 8
ternyata jawabannya benar nilai m sama
2m + 15 = 31
2m = 31 - 15
m = 16 : 2
m = 8
masukkan nilai m pada persamaan kedua :
2m + 15 - 9 = 31 - 9
2m + 15 = 31
31 - 9 = 31 - 9
m bernilai sama , m = 8