20*Х=7528-6128
20*Х=1400
x=1400:20
x=70
с*40=1800+1400
с*40=3200
c=3200:40
c=80
20х=1400
х=1400:20
х=70
40с=3200
с=3200:40
с=80
20*Х=7528-6128
20*Х=1400
x=1400:20
x=70
с*40=1800+1400
с*40=3200
c=3200:40
c=80
20*Х=7528-6128
20х=1400
х=1400:20
х=70
с*40=1800+1400
40с=3200
с=3200:40
с=80