<span> y=4/ x ,
y=х-3
4/х=х-3
4=х</span>²-3х
х²-3х-4=0
D = (-3)²<span><span> - 4·1·(-4) = 25</span>
<span><span>x1 = (</span>3 - √25)/</span></span>2·1<span><span> = -1</span>
<span><span>x2 = (</span>3 + √25)/</span></span>2·1<span><span> = 4
</span><span>у=4/4=1
у=4/-1=-4
точки пересечения: (-1;-4) и (4;1)
</span></span>
3 • 4 = 4 • 3
Так как
12 = 12
200х + 500(х - 2) = 2500.
200х + 500х - 1000 = 2500
200х + 500х = 2500 + 1000
700х = 3500
х = 3500 : 700
х = 5
Ответ: х = 5.