Х*60+260=800
60х=800-260
60х= 540
х=540:60
х= 9
450+С/8=500
с:8=500-450
с:8=50
с=50*8
с=400
x*60+260=800
x*60=800-260
x*60=540
x=540/60
x=4
4*60+260=800
800=800
450+c/8=50
c/8=450-50
c/8=400
c=400/8
c=50
450+3200/8=500
500=500
Х*60+260=800
60х=800-260
60х= 540
х=540:60
х= 9
450+С/8=500
с:8=500-450
с:8=50
с=50*8
с=400
x*60+260=800
x*60=800-260
x*60=540
x=540/60
x=4
4*60+260=800
800=800
450+c/8=50
c/8=450-50
c/8=400
c=400/8
c=50
450+3200/8=500
500=500