360/(12-x)-15=25 480/(34-x/7)=16
Реши уравнение и сделай проверку

360/(12-х)-15=25360/(12-х) = 25+15360/(12-х) = 4012-х = 360/4012-х = 9х = 12-9х= 3Проверка:360/(12-3)-15 = 360/9 - 15 = 40-15 = 25480/(34-x/7)=1616• (34 - х/7) = 48034 - х/7 = 480/1634 - х/7 = 30х/7 = 34-30х/7 = 4х= 4•7х = 28Проверка:480 / (34 - 28/7) = 480 / (34-4) = 480/30 = 16