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2014-05-20T18:43:25-03:00
2014-05-20T18:45:00-03:00
a) 6x+10=3x-5 
6x-3x = -5-10
3x = -15
x = -15/3
x = -5

b) 18x-100=8x+200
18x-8x = 200 + 100
10x = 300
x = 300/10
x = 30

c) 3x-8=2x+10
3x-2x = 10+8
x = 18

d) 5x-2x=2x+33
5x-2x-2x = 33
x = 33.