Răspuns:
Explicație pas cu pas:
2×[3+5×(2×a-1)]=56
3+5×(2×a-1) = 56 : 2 = 28
5×(2×a-1) = 28 - 3 = 25
2×a-1 = 25 : 5 = 5
2×a = 5 + 1 = 6
a = 6 : 2 = 3
[tex] \huge \bold \red{a = 3}[/tex]
Buna !!
•Rezolvarea:
**mai jos↓
•2×[3+5×(2×a-1)]=56
•3+5×(2×a-1)=56:2
•3+5×(2×a-1)=28
•5×(2×a-1)=28-3
•5×(2×a-1)=25
•2×a-1=25:5
•2×a-1=5
•2×a=5+1
•2×a=6
•a=6:2
•a=3
**Verificarea:
•2×[3+5×(2×3-1)]=56
•2×[3+5×(6-1)]=56
•2×(3+5×5)=56
•2×(3+25)=56
•2×28=56
•56=56 ✓✓
Succes !!;)
✿❀AndreeaBrainly123❀✿
