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2022-04-16 14:42:47
a, 5x-3=12
<=> 5x = 15
=> x = 3
b, => 3(x+2) = 2(x+1)
<=> 3x + 6 = 2x + 2
<=> x = -4
c, TH1: 2x + 6 = x - 3
<=> x = -9
TH2: 2x + 6 = -x + 3
<=> 3x = -3
<=> x = -1
2022-04-16 14:37:36
72 phút = 1,2 giờ
2 1/2ha = 25000 m2
7 ngày 15 giờ = 7,625 ngày
1 phút 15 giây = 75 giây
2022-01-11 10:56:39
2022-01-11 10:54:38
2022-01-11 10:54:38
2022-01-11 10:52:17
2022-01-11 10:52:17
2022-01-11 10:45:49
2022-01-11 10:45:49
2022-01-11 10:43:41