<span>10х-2(4х-5)=2х+10</span>
<span>Раскрим скобки:</span>
<span>10x-8x+10=2x+10</span>
<span>2x-2x=0</span>
0x=0
х-любое число
Ответ: х-любое
<span>1)(-0.76-0.44):2*2/3=(-1,2)):2*2/3=(-1,2)/3=-0,4</span>
<span>2) <span>(3*5/14-2*3/4)*(-3*5/17)=(15/14-6/4)(-15/17)=((30-42)/28)(-15/17)=(3/7)*(15/17)=45/119</span></span>