2)
{ [ 1545 : ( 201 - 2 × a ) + 95 ] × 3 - 18 } : 12 = 26
[ 1545 : ( 201 - 2 × a ) + 95 ] × 3- 18 = 26 × 12
[ 1545 : ( 201 - 2 × a ) + 95 ] × 3 - 18 = 312
[ 1545 : ( 201 - 2 × a ) + 95] × 3 = 312 + 18
[ 1545 : (201 -2 × a) + 95 ] × 3 = 330
1545 : ( 201 - 2 × a)+95 = 330 ÷ 3
1545 : ( 201 -2 × a )+95 = 110
1545 : ( 201 -2 × a ) = 110 - 95
1545 : ( 201 - 2 × a ) = 15
201 - 2 × a = 1545 : 15
201 - 2 × a = 103
2 × a= 201 - 103
2 × a = 98
a = 98 : 2
a =49
Răspuns: e
3)
6364 :{ 2 × [ 30 + ( 4 × a - 12 ) + 4 ] } = 37
2 × a [ 30 + ( 4 × a - 12 ) + 4 ] = 6364 : 37
2 × a [ 30 + ( 4 × a - 12 ) + 4 ] = 172
30 +( 4 × a - 12 ) + 4 = 172 : 2
34 +( 4 × a - 12 ) = 86
4 × a - 12 = 86 - 34
4 × a -12 = 52
4 × a = 52 + 12
4 × a = 64
a = 64 : 4
a =16
Răspuns: d
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