Первое число - 100х + 10у + 7
Второе число - 700 + 10х + у
<span>(100х + 10у + 7)*3 - 17 = <span>700 + 10х + у</span></span>
<span><span><span>300х+30у+21-17= 700+10х+у</span></span></span>
<span><span><span><span>290х+29у=696 </span></span></span></span>
<span><span><span><span><span>10х+у=24 </span></span></span></span></span>
<span><span><span><span><span><span>т.е. х=2, подставим его в любое уравнение получим - у=4 ...От сюда... <span>числа 247 и 724</span></span></span></span></span></span></span>
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<span><span><span><span><span><span><span>Проверка:</span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span>247*3=741</span></span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span><span>741-17=724</span></span></span></span></span></span></span></span></span>
8+3(х-5)+х=2(3+2х)
8+3х-15+х=6+4х
4х-4х=-8+6+15
0=13
1/2х*2+1/4х-1/4*2=х
3/4х-1/2=х
3/4х-х=1/2
-1/4х=1/2
х=-1/2*1/4
х-1/8
Корень из 209=14,4568322948
(mn + k) – всего мест, где m = 30, n = 25, k = 60
30 ⋅ 25 + 60 = 750 + 60 = 810 (мест)
<span>Ответ: 810 мест</span>
