Автор - valeriasandalova

33a-23b+71 если
 frac{3a - 4b + 8}{4a - 3b + 8 }  = 9

Ответ

Автор - TheSerj

frac{3a-4b+8 }{4a-3b+8}=9  

3a-4b+8=9·(4a-3b+8)

3a-4b+8=36a-27b+72

3a-36a-4b+27b+8-72=0

-33a+23b-64=0

33a-23b=-64


тогда

33a-23b+71=-64+71=7

Ответ.33a-23b+71=7

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