41/12 - 49/18 = 3х-23/9
(41*3 - 49*2)/18 = 3х-23/9
25/18+23/9 = 3х
(25+23*2)/18 = 3х
71/18 = 3х
71/18*3 = х
71/54 = х
Умножаем в столбик
6,35
*
4,82
-----------
1270
5080
2540
-------------
30,6070
<span>Д) 3+11y=203+y</span>
<span>-200+11y-y=0</span>
<span>-200+10y=0</span>
y=200/10
y=20
<span>З) c-32=(c+8)*(-7)</span>
c-32-(-7c-56)=0
8c-32+56=0
8c+24=0
c=-24/8
c=-3
<span>К) -5*(3a+1)-11=-16</span>
<span>-15a-5-11+16=0</span>
<span>-15a=0</span>
a=0