Respostas

2014-08-15T09:08:30-03:00
2(9x - 4) - 7 + (6-5x)3= 18
18x - 8 -7 + 18 - 15x = 18
18x - 15 + 18 - 15x = 18
18x - 15x + 3 = 18
18x - 15x = 18 - 3
3x = 15
x = 15 / 3
x = 5
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2014-08-15T10:29:02-03:00


2 . ( 9x - 4 ) - 7 + ( 6 - 5x ) . 3 = 18
18x - 8 - 7 + 18 - 15x = 18
18x - 15x = 18 + 8 + 7 - 18
3x = 15
x = 15 / 3
x = 5

Bons estudos !
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