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Calculeaza necunoscuta [362:a+364]:5*16-1344=400
(138*5-21:7-300*2)-9*9














(362:a+364):5*16-1344=400
(138*5-21:7-300*2)-9*9-a*2=2
[(26-a)*9:3]+108*7=900-84







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Răspuns :

(362:a+364):5x16-1344=400
(362:a+364):5x16=400+1344
(362:a+364);5x16=1744
(362:a+364):5=1744:16
(362:a+364):5=109
362:a+364=105x9
362:a+364=545
362:a=545-364
362:a=181
a=362:181
a=2
[(26-a)X9:3]+108X7=900-84
[(26-a)x3]+756=816
[(26-a)x3=816-756
(26-a)x3=60
26-a=60:3
26-a=20
a=26-20
a=6
(138x5-21:7-300x2)-9x9-ax2=2
(690-3-600)-81-ax2=2
87-81-ax2=2
6-ax2=2
ax2=6-2
ax2=4
a=4:2
a=2

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