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(это проверка)
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1) P\50=2948 => P=2948*50=147400
2) 640-x=69 => x=571
3) 70*D=49000 => D=700
4) R-156 = 1880 => R=2036
5) 3200 \ Y = 4 => Y= 3200\4=800
_____________________________________________
(это проверка)
======================================================
______________________________________________________
======================================================
______________________________________________________
======================================================
______________________________________________________
======================================================
_____________________________________________________
1) P\50=2948 => P=2948*50=147400
2) 640-x=69 => x=571
3) 70*D=49000 => D=700
4) R-156 = 1880 => R=2036
5) 3200 \ Y = 4 => Y= 3200\4=800