Question

Cine ma ajuta si pe mine va rog: 5×a+5=560, 8+a+8=880, 72:a+13=22, a:9+14=23, 400:8:2+40×5+63×5. Suma a 5 numere consecutive egala cu 580 ,care sunt numerele

Answer 1

5a+5=560=>5a=555=>a=111
a+16=880=>a=864
71:a=8=>a=9
a:9=9=>a=1
25+200+315=640
problema :
a+b+c+d+e=580
b=a+1 ; c=a+2 ;
d=a+3 ; e=a+4 ;
a+a+1+a+2+a+3+a+4=580=>5a+10=580=>5a=570=>a=114