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Determinati numarul a stiind ca: 64-{15+[(11a+25)/3+13]/4}/2=52

Răspuns :

64-{15+[(11a+25)/3+13]/4}/2=52

{15+[(11a+25)/3+13]/4}/2=64-52

{15+[(11a+25)/3+13]/4}/2=12

{15+[(11a+25)/3+13]/4}=12x2

15+[(11a+25)/3+13]/4=24

[(11a+25)/3+13]/4=24-15

[(11a+25)/3+13]/4=9

[(11a+25)/3+13]=9x4

(11a+25)/3+13=36

(11a+25)/3=36-13

(11a+25)/3=23

(11a+25)=23x3

11a+25=69

11a=69-25

11a=44

a=44:11

a=4

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