Ответ 1,25
(1 / 5)=0,2 (1 / 5) / 2=0,1
Log ( 1/2 ) ( 3x - 5 ) = 2
1/2 ^ 2 = 3x - 5
0,25 = 3x - 5
3x = 5,25
X = 1,75
<span>2x-3y=3
</span><span>x+3y=18
</span>
3x=21
x=21
21+3y=18
3y=-3
y=-1
<span>2x+y=5,4 | *-1
</span><span>x+y=6,4 |
</span>
-2x-y=-5,4
x+y=6,4
-x=1
x=-1
-1+y=6,4
y=7,4
<span>2x-3y=5 |*-1
</span><span>5x-3y=11 |
</span>-2x+3y=-5
5x-3y=11
3x=6
x=2
4-3y=5
-3y=1
y=-¹/₃
7+14*(-25)-49/7=-392/7=-56