1) 0,2^(3-5х) = √5;0,2^(3-5х) = 5^0,5;3 – 5x = 0,5;-5x = 0,5 – 3;-5x = - 2,5;x = -2,5/(-5);x = 0,5Ответ. 0,5.2) 4^(9х-11)=1/16;4^(9х-11)=4^(-2);9x – 11 = -2;9x = -2 + 11;9x = 9; x = 9/9;x = 1.Ответ.1.3) 2*0,5^(х+7) = 1/8;2*(1/2)^(х+7)=2^(-3);2*2^(-х-7)=2^(-3);2^(-х-6)=2^(-3);-x – 6 = - 3;-x = -3 + 6;- x = 3;x = -3.Ответ. -3.4) (1/5)^(х-6)=125^х;(5)^(6-x)=5^3х;6 – x = 3x;-x – 3x = -6;-4x = -6;x= 6/4;x = 3/2;x = 1,5.Ответ. 1,5. 5) 2^(4-х)=0,04*10^(4-х);2^(4-х)=0,04*(2*5)^(4-х);2^(4-х)=0,04*(2*5)^(4-х);2^(4-х)=0,04*2^(4-x)*5^(4-х);2^(4-х)/ 2^(4-х) = 0,04*5^(4-х);1 = 0,04*5^(4-х);5^(4-х) = 1/0,04;5^(4-х) = 25;5^(4-х) = 5^2;4-x=2;-x=2-4;-x=-2;x=2.Ответ. 2.