( z + v )/15 - ( z - v )/3 = 1
Z + v - 5( z - v ) = 15
z + v - 5z + 5v = 15
6v - 4z = 15
••••••••••••••
( 2z - v )/6 - ( 3z + 2v )/3 = - 25
2z - v - 2( 3z + 2v ) = - 25•6
2z - v - 6z - 4v = - 150
- 5v - 4z = - 150
•••••••
5v + 4z = 150
6v - 4z = 15
11v = 165
v = 15
6•15 - 4z = 15
4z = 90 - 15
z = 75 : 4
z = 18,75
Ответ
z = 18,75
v = 15
Х+4 х+3 х-2
------- -х +5= -------- - ---------
5 3 2
х+4-5х+25 2х+6 -3х+6
------------------ = ---------------------
5 6
29 -4х 12-х
----------- = --------------- домножим обе части на 30
5 6
6*(29 -4х)=5*(12-х)
174 -24х=60-5х
19х=114
х=6
(7⁹14¹¹)/(7¹⁸2¹²)=(7⁹(2·7)¹¹)/(7¹⁸2¹²)=(7⁹2¹¹·7¹¹)/(7¹⁸2¹²)=(7²⁰2¹¹<span>)/(7¹⁸2¹</span>²)=7²/2=49/2=24,5