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-x= 1,3-4
-x=2,7
x=-2,7
8,3 - 2x = 0,5
-2x=0,5-8,3
-2x=7,8
x=-3,9
4 - x = 1,3
-x=1,3-4
-x=-2,7
x=2,7
2.
8,3 - 2x = 0,5
-2x=0,5-8,3
-2x=-7,8
x=3,9