Respostas

A melhor resposta!
2014-06-09T21:32:43-03:00
5 ( 3 - x ) = 2 (x - 4) + 15
15 - 5x = 2x -8 + 15
-5x - 2x = 15 - 8 - 15
-7x = -8
x= -8 ÷ -7

x = 0,875
3 4 3
2014-06-09T21:33:41-03:00
5 (3 - x ) = 2 (x - 4 ) + 15 
15 -5x = 2x -8 +15
10x -2x= -8 +15 
8x = 7
x= 7/8