x + 90 = 250 - 50
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4 tháng 12 2016
560 x 90 + 560 x 10
= 560 x (90 + 10 )
= 560 x 100
= 56000
k minh nha minh k lai
4 tháng 12 2016
560 x 90 + 560 x 10
= 560 x ( 90 + 10 )
= 560 x 100
= 56 000
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TP
6
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x +90 = 250 -50
x + 90 = 200
x = 200 - 90
x = 110
x + 90 = 250 - 50
x + 90 = 200
x = 200 - 90
x = 110