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2014-11-18T16:18:40+02:00
A)4x+7=x-3

3x=-10

x=-10 supra 3

b)6x+3=5x-2

x=-5

c)2x-8=3-3x-15

x=-4

d)3x-5=16

3x=21

x=7

e)2x-2+3=31-x

2x+1=31-x

3x=30

x=10