Question

[249 – (3 • 60 + n)] : [31 – (4 • 8 – 8)] = 7

prin metoda mersului invers 30 puncte repede!!!!

Answer 1

Răspuns:

[249-(180+n)]:[31-(32-8)]=7

[249-(180+n)]:(31-24)=7

[249-(180+n)]:7=7

249-(180+n)=7×7

249-(180+n)=49

180+n=249-49

180+n=200

n=200-180

n=20