11,12,10,13,9,4,10,3,11,2,12,1,13
Думаю так
<span>1,7<</span><span>√3</span><span><1,8</span>
<span>1) 1.7*3<3√3<1.8*3</span>
<span>5.1<3√3<5.4</span>
<span>2) 1.7*2<2√3<1.8*2</span>
<span>3.4<2√3<3.6</span>
<span>5-3.4>5-2√3>5-3.6</span>
<span>1.6>5-2√3>1.4</span>
Х+1,4х=х+х+16
х+1,4х=2х+16
2,4х=2х+16
0,4х=16
х=16:0,4
х=40
5250*100/7500 =70
Следовательно 100-70=30
На 30%снизили цену