<span>13,4x+2,8=10,84</span>
<span>13,4х=10,84-2,8</span>
<span>13,4х=8,04</span>
<span>х=0,6</span>
<span><span>0,91:3,64-0,8m=0,109</span></span>
<span><span>0,25-0,8м=0,109</span></span>
<span><span>-0,8м=0,109-0,25</span></span>
<span><span>-0,8м=-0,141</span></span>
<span><span>м=0,17625</span></span>