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2014-03-09T22:41:55-03:00
9 + 2 .(5x -4) = 21
9 + 10x -8 = 21
10x = 21 - 1
10x = 20
x= 20/10
x= 2
5 4 5
9 + 2 .(5x -4) = 21
9 + 10x -8 = 21
10x = 21 - 1
10x = 20
x= 20/10
x= 2
9 + 2 .(5x -4) = 21
9 + 10x -8 = 21
10x = 21 - 1
10x = 20
x= 20/10
x= 2 eu acho que e isso
2014-03-09T22:42:11-03:00


9 + 10x - 8 = 21

10x = 21 - 1

10x = 20

x = 2

2 4 2