(k+ 5).7-54=(k+5).4
и
(y+1).18=36+12.(y+1)
7к+35-54=4к+203к-39=0к=13и18у+18=36+12у+126у-30=0у=5
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7к+35-54=4к+20
3к-39=0
к=13
и
18у+18=36+12у+12
6у-30=0
у=5