Предмет: Математика, автор: doris47

(х-5)/2=(9-х)/3,   
(8+х)/7=(3х-5)/6,5

Ответы

Автор ответа: DragonetSoul
2
<br />1)3(x-5)=2(9-x)\\<br />3x-15=18-2x\\<br />5x=33\\<br />x=6.6\\<br /><br />2) (8+х)/7=(3х-5)/6,5\\<br />6.5(8+x)=7(3x-5)\\<br />52+6.5x=21x-35\\<br />87=14.5x\\<br />x=6<br /><br /><br />
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