Respostas

2014-03-16T21:27:02-03:00
Rspostas: 

1) 23x-16=14-17x

23x+17x=14+16
30x=30  
x=30/30 =1

2) 
5x+4x-10=2x-2
    7x=8 =7/8

3 ) 10-9x+2x+4=0

-7x+14=0 . (-1)
 7x-14=0
7x=14 =2

4)
x+2x-1-3=x
2x-4=0 =2

5) -10+4-2x=-4x-7
2x= -1
x= -1/2

6) 2-4x+32-18x+12

2-4x+32-18x+12=0
-22x+46=0 (-1)
22x-46=0
x=46/22

7)2x+3=9
2x=9-3
x=6/2=3


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