Question

afla numarul necunoscut: [12×5-(a:11-630:63)×5]:55=1
va rog repede, dau coroana !! ​

Answer 1

COROANA TE ROG

[12×5-(a:11-630:63)×5]:55=1 | inmultim cu 55  

12×5-(a:11-630:63)×5=55 | impartin la 5  

12-(a:11-10)=11  

-(a:11-10)=-1 | inmultim cu -1  

a:11-10=1  

a:11=11  

a=121

Answer 2

$\it [12\-(a:11-630:63)\cdot5]:55=1|_{\cdot55} \Rightarrow 60-(a:11-10)\cdot5=55 \Rightarrow\\ \\ \Rightarrow (a:11-10)\cdot5=60-55 \Rightarrow (a:11-10)\cdot5=5|_{:5} \Rightarrow a:11-10=1|_{+10} \Rightarrow \\ \\ \Rightarrow a:11=11|_{\cdot11} \Rightarrow a=121$