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40+90:[9+48:(A+6)]=46

Răspuns :

90: [ 9+48:(a +6)] =6
9+ 48 : (a + 6) =90: 6
9+48 : (a +6) = 15
48: ( a +6) = 15-9
48: (a +6) = 6
a+ 6 = 48: 6
a+ 6 =8
a=8-6
a= 2
90: [ 9+48:(a +6)] =6
9+ 48 : (a + 6) =90: 6
9+48 : (a +6) = 15
48: ( a +6) = 15-9
48: (a +6) = 6
a+ 6 = 48: 6
a+ 6 =8
a=8-6
a= 2