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3×4+2×9-{4+[45-5×( 8-2×x)+23 ]\4}=14


Răspuns :

3×4+2×9-{4+[45-5×( 8-2×x)+23 ]\4}=14

12+18-(4+(45-40+10x+23)/4)=14

12+18-(4+(28+10x)/4)=14

12+18-(4+28+10x/4)=14

12+18-4-(28+10x)/4 = 14

26 - 2(14+5x)/4 = 14

52-(14+5x)=28

54-14-5x=28

38-5x=28

-5x=28-38

-5x=-10

x=2