999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999989999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
K
Khách
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N
2
25 tháng 11 2016
x + 20 = 600 + 400 + 20
x + 20 = 1000 + 20
x + 20 = 1020
x = 1020 - 20
x = 1000
24 tháng 11 2016
60 + 40 + x = 200 + 100
100 + x = 300
x = 300 - 100
x = 200
P
2
24 tháng 11 2016
x + 20 + 80 = 1000-800-0
x +100 = 200-0
x + 100 = 200
x = 200-100
x = 100
Duyệt đi , chúc bạn học giỏi
24 tháng 11 2016
x + 20 + 80 = 1000 - 800 - 0
x + 100 = 200 - 0
x + 100 = 200
x = 200 - 100
x = 100
23 tháng 11 2016
x + 20 = 50 + 50 + 50
x + 20 = 50 x 3
x + 20 = 150
=> x = 130.
23 tháng 11 2016
x+20=3x50=150
x=150-20=130
x=130
thu lai 130+20 = 50+50+50=150
23 tháng 11 2016
x + 600 = 1000
x = 1000 - 600
x = 400
k nha
ủng hộ nhéphamthiminhtrang
23 tháng 11 2016
mai co so cam la:5x2=10(qua)
hai ban co so cam la :5+10=15(qua )
dap so 15 qua
cái gì vay
tim duoc so 8 di
neu minh giai thich dung k minh nhe