(y*40+60):3=140
(y*40+60)=140*3
(y*40+60)=420
у*40=420-60
у*40=360
у=360/40
у=9
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(y*40+60):3=140
(y*40+60)=140*3
(y*40+60)=420
у*40=420-60
у*40=360
у=360/40
у=9