( 3A + 9B ) / ( 3B + 9A ) = - 8
( 3 * ( A + 3B )) / ( 3 * ( B + 3A ) = - 8
A + 3B = - 8 * ( B + 3A )
A + 3B = - 8B - 24A
A + 24A = - 8B - 3B
25A = - 11B
A = ( - 11/25 )B
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A / B = ( ( - 11/25 )B ) / B = - ( 11/25 ) = - 0,44
ОТвет ( - 0,44 )