\(1,\\ a,\Leftrightarrow\dfrac{12}{5}=\dfrac{x}{1,5}\Leftrightarrow x=\dfrac{12\cdot1,5}{5}=3,6\\ b,\Leftrightarrow\dfrac{\dfrac{8}{3}}{x}=\dfrac{\dfrac{16}{9}}{\dfrac{1}{5}}\Leftrightarrow x=\dfrac{\dfrac{8}{3}\cdot\dfrac{1}{5}}{\dfrac{16}{9}}=\dfrac{3}{10}\\ 2,\\ a,\Leftrightarrow x=\dfrac{3,75\cdot2,5}{4,8}=\dfrac{125}{64}\\ b,\Leftrightarrow\dfrac{0,6}{x}=\dfrac{x}{2,4}\Leftrightarrow x^2=0,6\cdot2,4=1,44\Leftrightarrow x=\pm1,2\\ 3,\\ a,\Leftrightarrow x^2=60\cdot15=900\Leftrightarrow x=\pm30\\ b,\Leftrightarrow\dfrac{1,25}{0,8}=\dfrac{0,375}{0,2x}\Leftrightarrow x=\dfrac{0,375\cdot0,8}{1,25\cdot0,2}=1,2\\ 4,\Leftrightarrow3x-6=12x-4\Leftrightarrow9x=-2\Leftrightarrow x=-\dfrac{2}{9}\\ 5,\Leftrightarrow x-3=\dfrac{27}{4}\cdot8=54\Leftrightarrow x=57\\ 6,\Leftrightarrow\dfrac{1}{4}:x=\dfrac{19}{5}:\dfrac{8}{5}=\dfrac{19}{8}\Leftrightarrow x=\dfrac{1}{4}:\dfrac{19}{8}=\dfrac{2}{19}\)
\(7,\Leftrightarrow64x+96=72x-24\Leftrightarrow8x=120\Leftrightarrow x=15\\ 8,\Leftrightarrow76\left(2x+5\right)=17\left(13x-2\right)\\ \Leftrightarrow152x+380=221x-34\\ \Leftrightarrow69x=414\Leftrightarrow x=6\)
