Jawapan

2016-09-24T11:11:17+08:00
X-1 = 2-x +1.... x+x=2+1+1.... 2x=4... x = 2... yg ada tanda modelers ( |....| ) tu merujuk kepada nilai sentiasa dlm simbol positif
2016-09-24T23:11:57+08:00
X - 1 = 2 - X + 1
X + X - 1 -2 -1 = 0
2X - 4 = 0
2X = 4
X = 4 ÷ 2
X = 2