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0,5x-5+6=0,5x+1
-1,5x+2+0,5x+1=-x+3
x=1
0,5x-5+6=0,5x-5+6/*10
10*0,5x-10*(-5)+10*6
5x-50+60
5x=60-50
5x=10//:5
x=2
*= razy mnożenie