17.4 : 0.3 = 58
30.6 : 0.6 = 51
6.25 : 2.5 = 2.5
1/3(2х - 3) = 4 1/6х
2х/3 - 1 = 25х/6 общ.знаменатель = 6
4х - 6 = 25х
4х - 25х = 6
- 21х = 6
х = - 6/21
2х+у=22
-3х+2у=-5
у=22-2х
-3х+2у=-5
-3х+2(22-2х)=-5
-3х+44-4х+5=0
-7х+49=0
7х=49
х=7
у=22-2х
у=22-14
у=8
Ответ: х=7,у=8
А3,м7,p10,e13
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