Respostas

2014-08-11T16:33:22-03:00
A)2x+2=3x-3
2x-3x=-3-2
-x=-5
x=5
b)5x+5=-8x+4
5x+8x=-5+4
13x=-1
x=-1/13
c)13+8x-4=-5x-10
8x+5x=-9-10
13x=-19
x=-19/13
d)4x+20+3x+15=21
7x==-35+21
x=-14/7
x=-2
e)2x+10-15+3x=10
5x=15
x=15/5
x=3
f)8x-8=8-8x+12
8x+8x=8+12
16x=20
x=20/16
x=5/4



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