200 - 100%
16 - x%
200 • х = 16 • 100
200х = 1600
2х = 16
Х = 8
Ответ: 8%
1.-2х^2+3х+1
<span>-2*(-0,5)^2+3(-0,5)+1=-2*0,25-1,5+1=-0,5-1,5+1=-2+1=-1
</span>
4.(2х-1)(х+2)-х(2х+5)=2х^2+4х-х-2-2х^2-5х=-2х<span>-2
5. ((2х+1)/3)-((4х-3)/2)=1
4х+2-12х+9=6
11-8х=6
-8х=6-11
8х=5
х=5/8</span>
<span>3^х-3^х-3=-78
3 (1^x - 1^x - 1) = -78
</span>
<span>1^x - 1^x - 1 = -78 / 3
</span><span>1^x - 1^x - 1 = -26
</span>
<span><span>1^x - 1^x = -26</span> + 1
</span><span>1^x - 1^x = -25
</span>