(20600 - 600) - ( 314 x 5 : x) = 19686
20000 - ( 1570 : x ) = 19686
1570 : x = 20000 - 19686
1570 : x = 314
x = 1570 : 314
x = 5
Vậy x = 5
20000-1570:X=19686
1570:X=20000-19686
1570:X=314
X=1570:314
X=5
(515 \(\times\) 40 - 600) - (314 \(\times\) 5 : \(x\)) = 19686
(20600 - 600) - 1570 : \(x\) = 19686
20 000 - 1570 : \(x\) = 19686
1570 : \(x\) = 20 000 - 19686
1570 : \(x\) = 314
\(x\) = 1570 : 314
\(x\) = 5