<span>15х=0.15</span>
<span>х=0.01</span>
<span><span>3.08/y=4</span></span>
<span><span>у=0.77</span></span>
<span><span><span>3a+8a=1.87</span></span></span>
а=0.17
<span>7z-3z=5.12</span>
z=1.28
<span>2t+5t+3.18=25.3</span>
<span>t=3.16</span>
16х-7х=612
9х=612
х=612:9
х=68
Получается 1целая 59\182 (сократила)
Решим дробью:
38/38 - 7+11/38 = 38/38 - 18/38 = 20/38 = 10/19