<span>1.6*(5x-1)=1.8x-4.7 </span>
<span>8х-1,6=1,8х-4,7</span>
<span>8х-1,8х=-4,7+1,6</span>
<span>6,2х=-3,1</span>
<span>х=-3,1:6,2</span>
<span>х=-0,5</span>
<span>проверка</span>
<span>1,6*(-0,5*5-1)=1,8*(-0,5)-4,7</span>
<span>1,6*(-2,5-1)=-0,9-4,7</span>
<span>1,6*(-3,5)=-5,6</span>
<span>-5,6=-5,6</span>