18y-5y+2y=45
15y=45
y=45/15
y=3
18у - 5у + 2у = 45
13у + 2у = 45
15у = 45
у = 45 : 15
у = 3
-------------------------
Ответ: y = 3
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18y-5y+2y=45
15y=45
y=45/15
y=3
18у - 5у + 2у = 45
13у + 2у = 45
15у = 45
у = 45 : 15
у = 3
-------------------------
Ответ: y = 3