7 938 - 14 *а =35 280 : 360
7 938 - 14а =98
14а = 7 938 - 98
14а = 7 840
а =7 840 : 14
а = 560
проверка :
7 938 - 14 * 560 = 35 280 : 360
7938-14*a=35280/360
7938-14*a=98
-14*a= 98-7938
-14*a= -7840
a= -7480/-14
а = 7480/14
a= 560
