X*60*(-200)=36000
a*(-20)*(-50)=-3000

х*60*(-200)=36000х*60=36000/(-200)х*60= -180х= -180/60х= -3а*(-20)*(-50)= -3000а*(-20)= -3000/(-50)а*(-20)=60а=60/(-20)а= -3

1)х * 60 * (-200) = 36000х * (-12000) = 36000-12000х = 36000х = 36000 : (-12000)х= -3проверка:(-3) * 60 * (-200) = 360003 * 60 * 200 = 3600036000 = 360002)а * (-20) * (-50) = -3000а * 1000 = -30001000а = -3000а = -3000 : 1000а= -3проверка:(-3) * (-20) * (-50) = -3000-3 * 20 * 50 = - 3000-3000 = -3000