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-x - 5 + 6 = 11 + x
-x - x = 11 + 5 - 6
-2x = 10 /:-2
x = -5
Odp.: C. -5
5.1) 100% - 80 /:8
12,5% - 10 /x3
37,5% - 30
Odp.: A. 37,5%
5.2) 100% - 96 /:4
25% - 24
100% - 25% = 75%
Odp.: D. 75%