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2014-10-29T20:10:21+02:00
[(x+90)x5+700]=1200
(x+90)x5+700=1200
(x+90)x5=500
x+90=100
x=100-90
x=10
4 4 4
2014-10-29T20:15:10+02:00
[(x+360:4)x5+700]:600=2    
(x+90)x5+700=600x2    
(x+90)x5+700=1200     
(x+90)x5=1200-700      
(x+90)x5=500      
(x+90)=500:5      
(x+90)=100     
x+90=100     
x=100-90    
x=10
2 5 2