\(\text{Tìm }x\text{ : }\)
\(973-x\text{ : }34+12=729\)
\(973-x\text{ : }34=729-12\)
\(973-x\text{ : }34=717\)
\(x\text{ : }34=973-717\)
\(x\text{ : }34=256\)
\(x=256\cdot34\)
\(x=8704\)
973 - x : 34 + 12 = 729
=> 973 - x : 34 = 729 - 12
=> 973 - x : 34 = 717
=> x : 34 = 973 - 717
=> x : 34 = 256
=> x = 256 . 34
=> x = 8704
Vậy x = 8704