<span>х <span>n+6</span> = x4. n+6=4. n = 4-6 , n=-2; 2) х3-<span>n </span>= x -2, 3-n = -2, n = 3+2,
n = 5; 3) x -3*n * x3 = x6, -3n+3=6, -3n=3, n=-1; 4)x(-<span>n)*(-4)</span> = x -4, 4n=-4, n=-1.</span>
<span>log0.5 (x+3) <log0.25 (x+15)</span>
······································
0,01ab × 100a = a²b
······································
1
x+y=5
x=0 y=5
y=0 x=5
Ответ (0;5);(5;0)
2
2x+5y=19
x=0 5y=19⇒y=3,8
y=0 2x=19⇒x=9,5
Ответ (0;3,8);(9,5;0)
На 1 стоянке х машин, на второй 4х
х+35=4х-25
3х=60
х=20
На первой стоянке 20 машин, на второй 80 машин
Проверка
20+35=80-25
55=55
Ответ.На первой стоянке 20 машин, на второй 80 машин