Как?????????#2 в)))))

Question

Как?????????#2 в)))))

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Answer 1

(900-W)*60=5400
900-W=5400:60
900-W=90
W=900-90
W=810
Ответ:W=810

Answer 2

X=(910-890)*60
x=1200
900-w=5400:60=90
w=900-90
w=810