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396:[1+34:(3xa+4:2)]:12=11

Răspuns :

396 : [ 1 + 34 : ( 3 × a + 4 : 2 ) ] : 12 = 11

396 : [ 1 + 34 : ( 3 × a + 2 ) ] : 12 = 11

396 : [ 1 + 34 : ( 3 × a + 2 ) ] = 11 × 12

396 : [ 1 + 34 : ( 3 × a + 2 ) ] = 132

[ 1 + 34 : ( 3 × a + 2 ) ] = 396 : 132

[ 1 + 34 : ( 3 × a + 2 ) ] = 3

[ 34 : ( 3 × a + 2 ) ] = 3 - 1

[ 34 : ( 3 × a + 2 ) ] = 2

3 × a + 2 = 34 : 2

3 × a + 2 = 17

3 × a = 17 - 2

3 × a = 15

a = 15 : 3

a = 5

Răspuns


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