Question

Determinati numarul Natural a astel incat 7 supra a+1 mai mare sau egal Cu 5 supra 8

Answer 1

7/(a+1)-5/8≥0
7*8-5(a+1)/8(a+1)≥0
56-5a-5≥0
51≥5a
5a≤51
 a∈N
a∈{0;1;2;3;....;9;10}