Решите уравнения 1 а (3х+5)+(8х+1)=17 б 19-5(3х-1)=9 2 а 30+5(3х-1)-35х-25 б

1 . а ) (3х+5)+(8х+1)=17 ;
3 x + 5 + 8 * x + 1 = 17 ;
11 * x + 6 = 17 ;
11 * x = 17 - 6 ;
11 * x = 11 ;
x = 1 ;

б ) 19-5(3х-1)=9 ;
19 - 15 * x + 5 = 9 ;
- 15 * x = 9 - 19 - 5 ;
- 15 * x = - 15 ;
x = 1 ;

2. а ) 30+5(3х-1)-35х-25 = 0 ;
30 + 15 * x - 5 - 35 * x - 25 = 0 ;
- 20 * x + 0 = 0 ;
x = 0 ;
б ) 10х-5=6(8х+3)-5х ;
10 x - 5 = 48 x + 18 - 5 x ;
10 * x - 5 = 43 x + 18 ;
10 * x - 43 * x = 18 + 5 ;
- 33 * x = 23 ;
x = - 23 / 33 ;

3. а ) 6(8х+5)=0 ;
48 * x + 30 = 0 ;
x = - 30 / 48 ;
x = - 10 / 16 ;
x = - 5 / 8 ;
б ) 6(8х+5) = - 6 ;
8 * x + 5 = - 1 ;
8 * x = - 6 ;
x = - 6 / 8 ;
x = - 3 / 4 ;

c )(3-5,8х)-(2,2х+3)=16 ;
3 - 5 . 8 x - 2 . 2 x - 3 = 16 ;
- 5 . 8 x - 2 . 2 x = 16 ;
- 8 *x = 16 ;
x = - 2 ;

d ) 21=-20-8(2х-0,5) ;
21 = - 20 - 16 x + 4 ;
21 = - 16 - 16 * x ;
16 * x = - 16 - 21 ;
16 * x = - 37 ;
x = 37 / 16 ;

e ) -10(3-4х)+51=7(5х+3) ;
- 30 + 40 x + 51 = 35 x + 21 ;
21 + 40 * x = 35 * x + 21 ;
5 * x = 0 ;
x = 0 ;

f ) 6х-5(3х+2)=5(х-1)-8 ;
6 * x - 15 x - 10 = 5 x - 5 - 8 ;
- 9 x - 10 = 5 * x - 13 ;
- 14 x = - 3 ;
x = 3 / 14 ;

g ) -8(2х-0,5)=0 ;
- 16 x + 4 = 0 ;
- 16 x = - 4 ;
x = 4 / 16 ;
x = 1 / 4 ;
x = 0 . 25 ;

k ) -8(2х-0,5)=-8 ;
2 * x - 0 . 5 = 1 ;
2 * x = 3 / 2 ;
4 * x = 3 ;
x = 3 / 4.