Question

Pls, pls, pls! Am mare nevoie!

Answer 1

a2=10a+2
2a=20+a
Inlocuiesti
10a+2+20+a+11=11a+33=11(a+3)=>  a+3=11
a=11-3=8
b)conf   impartirii   cu   rest resturile   sunt 0,1,2,3,4,5
n1=55*6=330
n2=55*6+1=331
n3=55*6+2=332
n4=55*6+3=333
n5=55*6+4=334
n6=55*6+5=335
___________________
Le   adui
330+331+332+333+334+335=
Adunarea   o   faci   singura