50*(x:16) =40150
2700+y*400=170700
(12300-300):k=30
50 * (x : 16) = 40150
x : 16 = 803
x = 803 * 16
x = 12848
2700 + y * 400 = 170700
y * 400 = 168000
y = 168000 : 400
y = 420
(12300 - 300) : k = 30
30k = 12000
k = 400
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