Ответы на вопрос:
0,2 ^ ( 5x - y ) = 125 5 ^ ( - ( 5x - y)) = 5 ^ 3 - 5x + y = 3 11 ^ ( 2y - x ) = 1/121 11 ^ ( 2y - x ) = 11 ^ ( - 2 ) 2y - x = - 2 - 5x + y = 3 2y - x = - 2 y = 5x + 3 2 * ( 5x + 3 ) - x = - 2 10x + 6 - x = - 2 9x = - 8 x = - 8/9 y = 5 * ( - 8/9) + 3 = ( - 40/9 ) + 3 = ( - 4 4/9 ) + 3 = ( - 1 4/9 ) x + y = - 8/9 + ( - 1 4/9 ) = - 1 12/9 = - 2 3/9 = - 2 1/3 ответ ( - 2 1/3 )
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