Respostas

2014-03-16T21:44:17-03:00
3x+7=x+3
3x - x = 3 - 7
2x = -4
x = -4 / 2
x = -2

-7x+4+10x=4-2x
-7x + 10x + 2x = 4 - 4
5x = 0
x = 0 / 5
x = 0


5+6x=5x+2
6x - 5x = 2 - 5
x = -3


2-3x=-2x+12-3x
-3x + 2x + 3x = 12 - 2
2x = 10
x = 10 / 2
x = 5

2 5 2
2014-03-16T21:50:43-03:00
3x+7=x+3
3x-x=3-7
3x=-4
x=-4/3


-7x+4+10x=4-2x
-7x+10x+2x=4-4
x=0

5+6x=5x+2
6x-5x=2-5
x=3

2-3x=-2x+12-3x
x=5
1 5 1