<span> -9(3х-8у)+4(11 х-2у)= -18x+18y+44x-8y=44x-8y=44*(-1.3)-8*2.2=57.2-17.6=39.6</span>
<span> -9(3х-8у)+4(11 х-2у)</span>
<span>-9(3*1.3 - 8*2.2) + 4(11 * 1.3 - 2 * 2.2)</span>
-9*(<span>−13,7) + 4*<span>9,9</span></span>
<span><span><span>123,3 + <span>39,6= <span>162,9</span></span></span></span></span>