<span>1) 7х/6-5х/18=4/27
</span>21х/18-5х/18=4/27
(21х-5х)/18=4/27
16х/18=4/27
8х/9=4/27
8x=4/3
x=1/6
2) <span>2х/7+х/4=15/14
</span><span>8х/28+7х/28=30/28
</span>8х+7х=30
15x=30
x=2
3) <span>-х/8+1=х/12
</span><span>-3х/24+24/24=2х/24
</span>-3х+24=2х
5x=24
x=24/5
1)2/5+13/15=6/15+13/15=19/15
2)19/15*6=38/5=7,6
1+8(3х+7)=9
1+24х+56=9
24х=9-1-56
24х=-48
Х=-48:24
Х=-2
<u>6 ⁹ </u> = <u>3 ⁹ * 2 ⁹</u> =3² * 2 ⁵=9*32=288
3⁷ * 2 ⁴ 3⁷ * 2 ⁴