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1 00-(36+6x9-(a/3+15))/3=77 a=?

Răspuns :

100-(36+6x9-(a/3+15))/3=77
-[36+54-(a/3+15)]/3=77-100
[36+54-(a/3+15)]/3=23
90-(a/3+15)=69
-(a/3+15)=69-90
a/3+15=21
a/3=6
a=18



-(36+54-(a/3+15)/3=77-100
90-(a/3+15)=23x3
90-69=a/3+15
a/3=21-15
a/3=6
a=18