Объяснение:
200-80t=20t
-80t-20t=-200
-100t=-200
t=2
x1=200-80×2
x1=40
x2=20t=20×2=40
5t=-300+10t
5t-10t=-300
-5t=-300
t=60
x1=-300+10×60=300
x2=5t=5×60=300
